Display panel optical cross-talk compensation systems and methods

ABSTRACT

Techniques for implementing and/or operating an electronic device that includes or utilizes a display panel. The display panel includes an organic light-emitting diode layer, an encapsulation layer disposed over the organic light-emitting diode layer, and a color filter layer disposed over the encapsulation layer. The color filter layer overhangs the organic light-emitting diode layer and comprises a first color filter cell of a first color component sub-pixel that at least partially overlaps an organic light-emitting diode of a second color component sub-pixel that is a different color compared to the first color component sub-pixel.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to and the benefit of U.S. ProvisionalApplication No. 62/906,563, filed Sep. 26, 2019, and entitled, “DISPLAYPANEL OPTICAL CROSS-TALK COMPENSATION SYSTEMS AND METHODS,” and U.S.Provisional Application No. 62/906,625, filed Sep. 26, 2019, andentitled, “DIGITAL OPTICAL CROSS-TALK COMPENSATION SYSTEMS AND METHODS,”each of which is incorporated herein by reference in its entirety forall purposes. This application is related to U.S. application Ser. No.17/003,638, filed Aug. 26, 2020, entitled “Digital Optical Cross-TalkCompensation Systems and Methods,” which is incorporated herein byreference in its entirety for all purposes.

SUMMARY

A summary of certain embodiments disclosed herein is set forth below. Itshould be understood that these aspects are presented merely to providethe reader with a brief summary of these certain embodiments and thatthese aspects are not intended to limit the scope of this disclosure.Indeed, this disclosure may encompass a variety of aspects that may notbe set forth below.

The present disclosure generally relates to electronic displays, whichmay be implemented and/or operated to present visual representations ofinformation by displaying one or more images (e.g., image frames and/orpictures) on its display panel. Accordingly, electronic devices, such ascomputers, mobile phones, portable media devices, tablets, televisions,virtual-reality headsets, and vehicle dashboards, among many others,often include and/or utilize one or more electronic displays. In anycase, an electronic display may generally display image content byactively controlling light emission from display pixels, which eachincludes one or more color component sub-pixels, implemented on itsdisplay panel based on corresponding image data, which is indicative oftarget characteristics (e.g., color and/or magnitude) of light emissiontherefrom.

For example, a display pixel in an electronic display may include one ormore red sub-pixels that control magnitude of red light emission fromthe display pixel, one or more blue sub-pixels that control magnitude ofblue light emission from the display pixel, one or more green sub-pixelsthat control magnitude of green light emission from the display pixel,one or more white sub-pixels that control magnitude of white lightemission from the display pixel, or any combination thereof.Additionally, an image pixel (e.g., image data corresponding with pointin image content) corresponding with the display pixel may include redcomponent image data (e.g., red grayscale level) indicative of targetred light emission from the display pixel, blue component image data(e.g., blue grayscale level) indicative of target blue light emissionfrom the display pixel, green component image data (e.g., greengrayscale level) indicative of target green light emission from thedisplay pixel, white component image data (e.g., white grayscale level)indicative of target white light emission from the display pixel, or anycombination thereof. In other words, to display image content at thedisplay pixel, the electronic display may actively control magnitude oflight emission from the one or more red sub-pixels of the display pixelbased on the red component image data, the magnitude of light emissionfrom the one or more green sub-pixels of the display pixel based on thegreen component image data, and so on.

Generally, magnitude of light emission from a display pixel (e.g., colorcomponent sub-pixel) varies with the amount of electrical energy storedtherein. For example, in some instances, a display pixel may include alight-emissive element, such as an organic light-emitting diode (OLED),that varies its light emission with current flow therethrough, a currentcontrol switching device (e.g., transistor) coupled between thelight-emissive element and a pixel power (e.g., V_(DD)) supply rail, anda storage capacitor coupled to a control (e.g., gate) terminal of thecurrent control switching device at an internal node of the displaypixel. As such, varying the amount of electrical energy stored in thestorage capacitor may vary voltage applied to the control input of thecurrent control switching device and, thus, magnitude of electricalcurrent supplied from the pixel power supply rail to the light-emissiveelement. In other words, at least in such instances, light emission froma display pixel may be controlled at least in part by controllingmagnitude of electrical power (e.g., voltage and/or current) supplied toits internal node.

However, it should be appreciated that the organic light-emitting diode(OLED) electronic display examples described in the present disclosureare merely intended to be illustrative and not limiting. In particular,it should be appreciated that the techniques described in the presentdisclosure may be applied to and/or implemented for other types ofelectronic displays. For example, the techniques may be adapted to aliquid crystal display (LCD) that uses a pixel electrode and a commonelectrode as a storage capacitor and a light-emitting diode (LED)backlight as a light-emissive element.

To facilitate controlling supply of electrical power and, thus,resulting light emission, an electronic display may include drivercircuitry electrically coupled its display pixels. For example, thedriver circuitry may include a scan (e.g., gate) driver electricallycoupled to each of the display pixels via a corresponding scan line anda data (e.g., source) driver electrically coupled to each of the displaypixels via a corresponding scan line. To write a display pixel (e.g.,color component sub-pixel), the scan driver may output an activation(e.g., logic high) control signal to a scan line coupled to the displaypixel, thereby causing the display pixel to electrically connect itsstorage capacitor to a data line coupled to the display pixel, and thedata driver may output an analog electrical (e.g., voltage and/orcurrent) signal to the data line based at least in part on correspondingimage data.

As described above, image data (e.g., image pixel in image content)corresponding with a display pixel on a display panel may be indicativeof target characteristics (e.g., color and/or magnitude) of lightemission therefrom, for example, by indicating one or more targetachromatic brightness (e.g., grayscale) levels (e.g., values) that aremapped to a light emission magnitude range associated with a panelbrightness setting used to display corresponding image content on thedisplay panel. Additionally, as described above, a display pixel mayinclude one or more color component sub-pixels, which are eachimplemented and/or operated to control light emission of a specificcolor. For example, a display pixel may include a red sub-pixel thatcontrols magnitude of red light emission from the display pixel, a greensub-pixel that controls magnitude of green light emission from thedisplay pixel, a blue sub-pixel that controls magnitude of blue lightemission from the display pixel, a white sub-pixel that controlsmagnitude of white light emission from the display pixel, or anycombination thereof.

To facilitate producing light of a target color, at least in someinstances, each color component sub-pixel implemented on a display panelmay include a color filter cell of an appropriate target color that isdisposed between a light-emissive element (e.g., OLED) and anoutward-facing viewing surface of the display panel. For example, a redsub-pixel may include a red color filter cell disposed over a redorganic light-emitting diode, a green sub-pixel may include a greencolor filter cell disposed over a green organic light-emitting diode, ablue sub-pixel may include a blue color filter cell disposed over a blueorganic light-emitting diode, a white sub-pixel may include a whitecolor filter cell disposed over a white organic light-emitting diode, orany combination thereof. Additionally, at least in some instances, anencapsulation layer, such as thin film encapsulation (TFE) layer, may beformed over the light-emissive elements, for example, to separate one ormore light-emissive elements (e.g., OLEDs) from the color filter layer.Thus, at least in such instances, a light ray emitted from alight-emissive element of a color component sub-pixel may pass throughthe encapsulation layer and the color filter layer before exiting theoutward-facing viewing surface of the display panel.

Generally, light emitted from a light source, such as an organiclight-emitting diode of a color component sub-pixel, radiates outwardlyfrom the light source, for example, in a conical shape. As such,magnitude of light emission is generally strongest along a normal axisof the light source and weakens the farther the emission angle deviatesfrom the normal axis. Accordingly, color filter cells are oftenimplemented such that their footprints (e.g., width, length, and/orpitch) are centered on the normal axes of corresponding light-emissiveelements, for example, to facilitate maximizing perceived brightnessresulting from actual light emission of the light-emissive elements whenthe display panel is viewed by a user's (e.g., human's) eye with aviewing angle of zero (e.g., pupil oriented perpendicular to displaypanel and/or along normal axis of display panel).

A human's eye generally perceives visible light due to interaction ofcones (e.g., photoreceptor cells) in its retina with corresponding lightrays. However, a human's eye generally has a limited field of view(FOV), which is centered on its viewing (e.g., gaze or pupil) angle. Dueto its limited field of view, at least in some instances, a human's eyemay perceive a first portion of light emitted from a display pixel, butnot a second portion of the light emitted from the display pixel, forexample, due to light rays in the second portion of the emitted lightnot actually reaching the eye's retina and, thus, being outside itsfield of view. In other words, luminance perceived by a human's eye maygenerally be dependent on its field of view.

However, the field of view of a human's eye may generally vary with itsviewing characteristics, such as viewing (e.g., gaze or pupil) angle,viewing location (e.g., pupil offset from center and/or pupil relief),and/or viewing aperture (e.g., pupil or eye box) size. For example,orientation (e.g., direction) of the field of view of a human's eye maybe dependent on its gaze (e.g., viewing or pupil) angle and, thus, achange in its gaze angle (e.g., due to eye rotation) may changeorientation of its field of view. Additionally or alternatively, size(e.g., span) of the field of view of a human's eye may be dependent onits pupil (e.g., viewing aperture or eye box) size and, thus, a changein its pupil size may change the size of its field of view.

Moreover, the sensitivity of a human's eye to visible light generallyvaries across its field of view. In particular, a central portion (e.g.,fovea) of an eye's retina is generally more sensitive to visible lightcompared to a peripheral (e.g., outer) portion of the eye's retina, forexample, due to the central portion of the retina including more and/ordenser cones while the peripheral portion includes fewer and/or lessdense cones. To facilitate accounting for the variation in sensitivityto visible light, at least in some instances, the field of view of ahuman's eye may be divided into a focus (e.g., foveal or highresolution) region, which is centered on its viewing angle,corresponding with the central portion of the eye's retina and one ormore periphery (e.g., non-foveal or low resolution) regions, which areoutside the focus region, corresponding with the peripheral portion ofthe eye's retina.

In other words, at least in some instances, the portion of light emittedfrom a display pixel (e.g., color component sub-pixel) that is actuallyperceived by a user's (e.g., human's) eye may vary with its field ofview and, thus, its viewing characteristics (e.g., angle, location,and/or aperture size) that resulted in the field of view. For example, acolor component sub-pixel may appear brighter when viewed from a viewingangle of zero (e.g., pupil oriented along normal axis) and darker whenviewed from a non-zero viewing angle (e.g., pupil orientation differentfrom normal axis). In fact, due to spatial offset between colorcomponent sub-pixels implemented on a display panel, a user's eye mayconcurrently view multiple color component sub-pixels with differentviewing angles. In other words, at least in some instances, a firstcolor component sub-pixel may appear brighter and a second colorcomponent sub-pixel may appear darker when the display panel is viewedwith a first viewing angle whereas the first color component sub-pixelmay appear darker and the second color component sub-pixel may appearbrighter when the display panel is viewed with a second (e.g.,different) viewing angle. Since a user's eye generally perceivesdifferent colors by averaging perceived light emission from multiplecolor component sub-pixels, at least in some instances, variations inperceived luminance of color component sub-pixels resulting fromdifferent sets of viewing characteristics may produce a perceivablecolor shift in image content displayed on the display panel.

Furthermore, as described above, a display panel may include anencapsulation layer implemented between a light-emissive element, suchas an organic light-emitting diode (OLED) of a color componentsub-pixel, and a color filter layer and, thus, light rays emitted fromthe light-emissive element pass through the encapsulation layer and thecolor filter layer before exiting an outward-facing viewing surface ofthe display panel. Additionally, as described above, light emitted froma light source, such as a light-emissive element (e.g., OLED) of a colorcomponent sub-pixel, generally radiates outwardly from the light source,for example, in a conical shape. In fact, due to radiation (e.g.,spread) of light rays emitted from a light-emissive element of a colorcomponent sub-pixel and the distance the light rays travel beforeexiting the color filter layer, at least in some instances, a portion ofthe light rays emitted from the light-emissive element of the colorcomponent sub-pixel may actually pass through a color filter cell of aneighboring (e.g., different colored) color component sub-pixel, therebyproducing optical cross-talk. For example, a portion of light emittedfrom an organic light-emitting diode of a red sub-pixel may pass througha red color filter cell of the red sub-pixel while another portion ofthe light emitted from the organic light-emitting diode passes through agreen color filter cell of a neighboring green sub-pixel.

When color filter cell footprints are centered over correspondinglight-emissive elements, viewing a display panel with a viewing angle ofzero generally results in the light that is emitted from thelight-emissive elements and actually perceived by a user's (e.g.,human's) eye passing through appropriately colored color filter cells.However, as viewing angle moves away from zero, a user's eye may end upperceiving more of the light that passes through a neighboring (e.g.,inappropriately colored) color filter cell, thereby increasingperceivability of color shift resulting from optical cross-talk. Inother words, different sets of viewing characteristics may affect theresulting field of view and, thus, color of light emitted from a displaypanel that is actually perceived by a user's eye, which, at least insome instances, may result in a perceivable color shift in image contentdisplayed on the display panel. That is, the color shift may result in aperceived color in image content displayed on a display panelperceivably differing from a corresponding target color, which, at lastin some instances, may affect perceived quality of the image contentand, thus, potentially the display panel displaying the image content,an electronic display including the display panel, and/or an electronicdevice including the display panel.

Accordingly, to facilitate improving perceived quality, the presentdisclosure provides techniques for implementing and/or operating anelectronic device to reduce perceivability and/or likelihood of a colorshift occurring in displayed image content, for example, due to opticalcross-talk between neighboring (e.g., differently colored) colorcomponent sub-pixels. In particular, the present disclosure providestechniques for implementing and/or operating the electronic device toadaptively process image data to facilitate compensating for (e.g.,offsetting) color shift expected to result from optical cross-talk.Additionally, the present disclosure provides techniques forimplementing (e.g., designing and/or manufacturing) a display panel ofan electronic display included in and/or used by the electronic deviceto facilitate reducing optical cross-talk and, thus, resulting colorshift.

In addition to a display panel and driver circuitry, in someembodiments, an electronic display may include a lens disposed over(e.g., overlaid on or overlapping) its display panel. In particular, insome such embodiments, the lens may be a convex-concave (e.g., meniscus)lens that focuses light emitted from the display panel, for example, tofacilitate presenting virtual (e.g., virtual reality and/or augmentedreality) image content. In other such embodiments, the lens may be abiconvex lens, a biconcave lens, a plano-convex lens, or a plano-concavelens. However, regardless of whether a lens is implemented in front ofthe display panel, optical cross-talk and, thus, perceivable color shiftmay occur under different viewing characteristics. In other words, thetechniques described in the present disclosure may be applied tofacilitate reducing optical cross-talk and, thus, resulting color shiftin electronic displays that includes a lens as well as electronicdisplays that do not include a lens.

As described above, optical cross-talk may result due to light emittedfrom a light-emissive element, such as an organic light-emitting diode(OLED), of a color component sub-pixel that passes through a neighboring(e.g., inappropriately colored) color filter cell actually beingperceived by a user's (e.g., human's) eye. Moreover, as described above,light emitted from a light-emissive element of a color componentsub-pixel may pass through the color filter cell of a neighboring colorcomponent sub-pixel due to emitted light rays radiating (e.g.,spreading) outwardly. In other words, since spread of light rays emittedfrom a light source generally increases as distance traveled by thelight rays increases, the amount of light emitted from a light-emissiveelement of a color component sub-pixel that passes through the colorfilter cell of a neighboring color component sub-pixel may be dependenton the distance the light travels before exiting the color filter layer.

As such, to facilitate reducing color shift resulting from opticalcross-talk, in some embodiments, panel implementation parameters may beadjusted to facilitate reducing the distance light rays emitted from alight-emissive element of a color component sub-pixel on a display paneltravel before exiting a color filter layer of the display panel, forexample, via a design and/or manufacturing process. In particular, insome such embodiments, the panel implementation parameters may beadjusted to reduce thickness (e.g., height) of an encapsulation layerformed between the light-emissive element and the color filter layer.For example, a design process may adjust current (e.g., baseline) panelimplementation parameters such that thickness of the encapsulation layeris reduced from a first (e.g., baseline) thickness (e.g., twomicrometers) to a second (e.g., adjusted or reduced) thickness (e.g.,one micrometer).

Additionally or alternatively, panel implementation parameters may beadjusted to change the size of one or more color filter cellsimplemented in a color filter layer of a display panel, for example, viaa design and/or manufacturing process. In particular, to facilitatereducing the distance light rays emitted from a light-emissive elementof a color component sub-pixel travel before exiting the color filterlayer, in some embodiments, the panel implementation parameters may beadjusted to reduce thickness (e.g., height) of one or more color filtercells implemented in the color filter layer. For example, a designprocess may adjust current (e.g., baseline) panel implementationparameters such that thickness of a color filter cell is reduced from afirst (e.g., baseline) thickness (e.g., two micrometers) to a second(e.g., adjusted or reduced) thickness (e.g., one micrometer). In fact,in some embodiments, the panel implementation parameters may be adjustedsuch that thickness of the color filter cell in the color filter layeras well as thickness of the encapsulation layer are both reduced. Inthis manner, the panel implementation parameters used to implement adisplay panel may be adjusted to facilitate reducing the distance lightrays emitted from a light-emissive element of a color componentsub-pixel travel before exiting a color filter layer, which, at least insome instances, may facilitate reducing the amount of light that passesthrough a neighboring color filter cell and, thus, optical cross-talkand resulting color shift.

Moreover, to facilitate reducing color shift resulting from opticalcross-talk, in some embodiments, panel implementation parameters mayadditionally or alternatively be adjusted to change the footprint (e.g.,width, length, and/or pitch) of one or more color filter cellsimplemented in a color filter layer of a display panel, for example, viaa design and/or manufacturing process. In particular, in someembodiments, the panel implementation parameters may be adjusted suchthat footprint of each color filter cell implemented in the color filterlayer is uniformly changed. For example, a design process may adjust thepanel implementation parameters such that pitch (e.g., width or length)of each color filter cell is increased from a baseline pitch by the sameamount (e.g., one nanometer).

In some embodiments, an adjusted footprint color filter layer maynevertheless be centered on a display panel. In other words, in suchembodiments, an increase in footprint of a color filter cell may resultin another (e.g., neighboring) color filter cell being shiftedoutwardly. In fact, in some embodiments, the footprint increase and/orthe positional shift resulting from the footprint increase may result ina color filter cell of a color component sub-pixel at least partiallyoverlapping a light-emissive element (e.g., OLED) of a neighboring colorcomponent sub-pixel. For example, when footprint of each color filtercell is uniformly increased, the amount of overlap between alight-emissive element of a color component sub-pixel and a color filtercell of a neighboring color component sub-pixel may generally be lowertowards the center of the display panel and increase moving away fromthe center of the display panel.

In other words, adjusting color filter cell footprint may change theportion of light emitted from a light-emissive element of a colorcomponent sub-pixel that passes through a color filter cell of aneighboring color component sub-pixel. However, at least in someinstances, adjusting color filter cell footprint too much may actuallyincrease perceivable color shift. For example, adjusting the panelimplementation parameters to double the baseline footprint of a colorfilter cell in a color component sub-pixel may result in the colorfilter cell completely overlapping an organic light-emitting diode(OLED) of a neighboring (e.g., different colored) color componentsub-pixel.

Accordingly, to facilitate improving perceived image quality, in someembodiments, a uniform adjustment to color filter cell footprint may beoptimized for a focus region in the field of view (FOV) of a user's(e.g., human's) eye resulting from various sets of viewingcharacteristics, for example, to facilitate reducing the amount of lightpassing through a neighboring (e.g., inappropriately colored) colorfilter cell that is perceived in the focus region. However, at least insome instances, a uniform adjustment to color filter cell footprint mayresult in a color shift spike (e.g., non-monotonic change) in aperiphery region of the field of view of a user's eye when the displaypanel is viewed with a non-zero viewing angle, for example, due to thenon-zero viewing angle resulting in light emitted from a light-emissiveelement of a central color component sub-pixel that passes through acolor filter cell of neighboring color component sub-pixel beingperceived in the periphery region. Although some amount of color shiftin a periphery region of the field of view may be acceptable, a colorshift spike may generally be more perceivable than a monotonicallychanging color shift.

To facilitate further improving perceived image quality, in otherembodiments, panel implementation parameters may be adjusted such thatcolor filter cell footprints are non-uniformly adjusted, for example,via a design and/or manufacturing process. In other words, in some suchembodiments, the footprint of different color filter cells may beadjusted from a baseline footprint by different amounts. In particular,to facilitate reducing color shift spikes resulting in a peripheryregion of a field of view when a display panel is viewed with a non-zeroviewing angle, in some embodiments, footprint of color filter cells maygradually increase moving from the center of the display panel toward anedge (e.g., side) of the display panel. For example, a design processmay adjust current (e.g., baseline) panel implementation parameters suchthat the color filter cell footprint of a central color componentsub-pixel is maintained at the baseline footprint and color filter cellfootprint of a first non-central color component is increased from thebaseline footprint by a first amount. Additionally, the design processmay adjust current panel implementation parameters such that the colorfilter cell footprint of a second non-central color component sub-pixel,which is farther from the central color component sub-pixel than thefirst non-central color component sub-pixel, is increased from thebaseline footprint by a second amount greater than the first amount.

In other words, varying color filter cell footprint in this manner mayfacilitate reducing the amount of overlap between light-emissiveelements (e.g., OLEDs) of central color component sub-pixels withneighboring (e.g., inappropriately colored) color filter cells whileincreasing the amount of overlap between light-emissive elements ofouter (e.g., non-central) color component sub-pixels with neighboringcolor filter cells. As such, when a display panel is viewed with anon-zero viewing angle that results in a central color componentsub-pixel being perceived in a periphery region of a resulting field ofview, the reduced amount of overlap may facilitate reducing the amountof light emitted from a light-emissive element (e.g., OLEDs) of thecentral color component sub-pixel that passes through a neighboringcolor filter cell and is perceived in the periphery region of the fieldof view. However, as described above, at least in some instances,adjusting color filter cell footprint too much may actually increasecolor shift.

Accordingly, to facilitate improving perceived image quality, in someembodiments, a non-uniform adjustment to color filter cell footprint maybe optimized for field of view (FOV) of a user's (e.g., human's) eyeresulting from various sets of viewing characteristics, for example, tobalance reduction in the amount of light passing through neighboringcolor filter cell that is perceived in a focus region of a field of viewwith reduction in the amount of light passing through the neighboringcolor filter cell (e.g., color shift spike) that is perceived in aperiphery region of the field of view. In fact, in some embodiments,panel implementation parameters may be adjusted to change footprint ofone or more color filter cells in a color filter layer while alsoreducing the distance light rays emitted from a light-emissive elementof a color component sub-pixel travel before exiting the color filterlayer, for example, via a design and/or manufacturing process. Merely asan illustrative example, current (e.g., baseline) panel implementationparameters may be adjusted to reduce thickness (e.g., height) of eachcolor filter cell and/or an encapsulation layer from a baselinethickness while uniformly increasing footprint of each color filter cellfrom a baseline color filter cell footprint, which, at least in someinstances, may facilitate reducing perceivability and/or likelihood of acolor shift spike resulting in a periphery region of a field of view.Although implementing a display panel of an electronic display in thismanner may facilitate reducing color shift, at least in some instances,some amount of color shift may nevertheless be perceivable in imagecontent displayed on the display panel.

To facilitate further improving perceived image quality, in someembodiments, an electronic device may include image processing circuitryimplemented and/or operated to process image data before processed(e.g., display) image data is supplied to an electronic display todisplay corresponding image content. For example, the image processingcircuitry may include a burn-in compensation (BIC) block (e.g.,circuitry group), which is implemented and/or operated to process imagedata to facilitate accounting for light emission variations resultingfrom display pixel aging (e.g., burn-in), and/or a white pointcompensation (WPC) block (e.g., circuitry group), which is implementedand/or operated to process image data to facilitate accounting for colorvariations (e.g., shifts) resulting from environmental conditions, suchas temperature (e.g., in addition to backlight brightness level).Moreover, to facilitate reducing color shift resulting from opticalcross-talk, the image processing circuitry may include an opticalcross-talk compensation (OXTC) block (e.g., circuitry group), which isimplemented and/or operated to process image data based at least in parton optical cross-talk compensation parameters.

To facilitate compensating for (e.g., offsetting) color shift resultingfrom optical cross-talk, in some embodiments, the optical cross-talkcompensation (OXTC) parameters may include one or more opticalcross-talk compensation factor maps, which each explicitly associates(e.g., maps) one or more pixel positions on a display panel to one ormore optical cross-talk compensation factors (e.g., offset values and/orgain values) to be applied to image data corresponding with a displaypixel at the pixel position. In fact, in some embodiments, an opticalcross-talk compensation factor map may explicitly associate a pixelposition with a set of multiple optical cross-talk compensation factors.For example, the optical cross-talk compensation factors associated witha pixel position may be indicated as a three-by-three matrix, whichincludes a red optical cross-talk compensation factor, a red-to-greenoptical cross-talk compensation factor, a red-to-blue optical cross-talkcompensation factor, a green-to-red optical cross-talk compensationfactor, a green optical cross-talk compensation factor, a green-to-blueoptical cross-talk compensation factor, a blue-to-red optical cross-talkcompensation factor, a blue-to-green optical cross-talk compensationfactor, and a blue optical cross-talk compensation factor. Thus, wheninput image data associated with the pixel position is received, theoptical cross-talk compensation block may apply each of the multipleoptical cross-talk compensation factors to the input image data, forexample, by multiplying the three-by-three matrix with a three-by-onematrix (e.g., vector) including red component input image data, greencomponent input image data, and blue component input image data.

Moreover, in some embodiments, an optical cross-talk compensation factormap to be used by image processing circuitry of an electronic device maybe stored in the electronic device, for example, in memory. In otherwords, in such embodiments, size of the optical cross-talk compensationfactor map may affect the amount of storage capacity available in theelectronic device. As such, to facilitate conserving (e.g., optimizing)storage capacity of the electronic device, in some embodiments, anoptical cross-talk compensation factor map may explicitly associate eachof a subset of pixel positions on a display panel with one or morecorresponding optical cross-talk compensation factors. In other words,in such embodiments, one or more pixel positions on the display paneland, thus, corresponding optical cross-talk compensation factors may notbe explicitly identified in the optical cross-talk compensation factormap.

When a pixel position is not explicitly identified in an opticalcross-talk compensation factor map, the optical cross-talk compensationblock may determine an optical cross-talk compensation factor to beapplied to image data corresponding with the pixel position byinterpolating optical cross-talk compensation factors associated withother pixel positions explicitly identified in the optical cross-talkcompensation factor map, for example, using linear interpolation,bi-linear interpolation, spline interpolation, and/or the like. Asdescribed above, in some embodiments, a pixel position may be associatedwith a set of multiple optical cross-talk compensation factors. In suchembodiments, when a pixel position is not explicitly identified in anoptical cross-talk compensation factor map, the optical cross-talkcompensation block may determine a set of optical cross-talkcompensation factor to be applied to image data corresponding with thepixel position by interpolating sets of optical cross-talk compensationfactors associated with other pixel positions explicitly identified inthe optical cross-talk compensation factor map. For example, the opticalcross-talk compensation block may determine a red optical cross-talkcompensation factor to be applied to image data corresponding with thepixel position by interpolating red optical cross-talk compensationfactors associated with other pixel positions explicitly identified inthe optical cross-talk compensation factor map, a red-to-green opticalcross-talk compensation factor to be applied to image data correspondingwith the pixel position by interpolating red-to-green optical cross-talkcompensation factor associated with the other pixel positions explicitlyidentified in the optical cross-talk compensation factor map, and so on.

However, at least in some instances, interpolation may result in someamount of error. In fact, interpolation error generally increases asinterpolation distance increases. Moreover, at least in some instances,susceptibility to perceivable color shift may vary across a displaypanel. For example, an outer (e.g., side) portion of the display panelmay be more susceptible to perceivable color shift than a centralportion of the display panel due to panel implementation parametersbeing optimized for a viewing angle of zero (e.g., pupil oriented alongnormal axis of display panel). To facilitate accounting for variation incolor shift susceptibility and interpolation error, in some embodiments,the pixel positions on a display panel explicitly identified in anoptical cross-talk compensation factor map may be non-uniformly spaced(e.g., distributed). For example, the optical cross-talk compensationfactor map may utilize a finer granularity for the outer portion of thedisplay panel by explicitly identifying more pixel positions per area inthe outer portion and utilize a coarser granularity for the centralportion of the display panel by explicitly identifying fewer pixelpositions per area in the central portion.

In some embodiments, a single (e.g., static) optical cross-talkcompensation factor map may be calibrated to a display panel to accountfor multiple different sets of viewing characteristics, for example,which each includes a viewing (e.g., pupil or gaze) angle, a viewinglocation (e.g., pupil offset from center and/or pupil relief), and aviewing aperture (e.g., pupil or eye box) size. However, as describedabove, a resulting field of view and, thus, perceivability of colorshift resulting from optical cross-talk generally varies when a displaypanel is viewed using different sets of viewing characteristics. Assuch, to facilitate improving efficacy of optical cross-talkcompensation, in other embodiments, the optical cross-talk compensationblock may include and/or have access to multiple candidate opticalcross-talk compensation factor maps, which are each calibrated for adifferent set of viewing characteristics. In other words, in suchembodiments, the optical cross-talk compensation block may select adifferent candidate optical cross-talk compensation factor map as atarget candidate optical cross-talk compensation factor map underdifferent sets of viewing characteristics and, thus, adaptively adjustprocessing of input image data.

To facilitate adaptively adjusting processing performed on image data,in some embodiments, an optical cross-talk compensation block mayreceive one or more viewing characteristic parameters indicative of aset of viewing characteristics with which a display panel to be used todisplay corresponding image content is expected to be viewed, forexample, from an eye (e.g., pupil) tracking sensor (e.g., camera). Inparticular, in some embodiments, the viewing characteristic parametersmay indicate a horizontal (e.g., x-direction) offset of pupil positionfrom a default (e.g., forward-facing) pupil position and a vertical(e.g., y-direction) offset of pupil position from the default pupilposition and, thus, may be indicative of expected viewing angle.Additionally, in some embodiments, the viewing characteristic parametersmay indicate a pupil relief (e.g., distance from pupil to display panel)and, thus, may be indicative of expected viewing location. Furthermore,in some embodiments, the viewing characteristic parameters may indicatea pupil size and, thus, may be indicative of expected viewing aperturesize.

In addition to an optical cross-talk compensation block, as describedabove, image processing circuitry implemented in an electronic devicemay include one or more other compensation blocks, such as a white pointcompensation (WPC) block and/or a burn-in compensation (BIC) block. Insome embodiments, the various compensation blocks (e.g., circuitrygroups) may be implemented in a hardware pipeline and, thus, seriallyprocess image data. Additionally, before processing by image processingcircuitry of an electronic device, in some embodiments, image data maybe stored in the electronic device, for example, in memory. Furthermore,as described above, the field of view (FOV) of a human's (e.g., user's)eye generally includes a focus region that is more sensitive to visiblelight and one or more periphery regions outside the focus region thatare less sensitive to visible light.

Leveraging the reduced sensitivity outside the focus region, in someembodiments, image data may be stored in a foveated (e.g., compressed orgrouped) domain that utilizes a pixel resolution different from (e.g.,lower than) a panel (e.g., native or non-foveated) domain of a displaypanel to be used to display corresponding image content, for example, tofacilitate conserving (e.g., optimizing) storage capacity of theelectronic device. In particular, in the foveated domain, an image framemay be divided in multiple foveation regions (e.g., tiles) in whichdifferent pixel resolutions are utilized. For example, a central (e.g.,first) foveation region may be identified in an image frame such that itis co-located with a focus (e.g., foveal) region of the field of viewwith which the image frame is expected to be viewed (e.g., visuallyperceived). Since the sensitivity to visible light in the focus regionis higher, in some embodiments, the central foveation region may utilizea pixel resolution that matches the (e.g., full) pixel resolution of thedisplay panel. In other words, in such embodiments, each image pixel(e.g., image data corresponding with point in image) in the centralfoveation region of the image frame may correspond with single displaypixel (e.g., set of one or more color component sub-pixels) implementedon the display panel.

In addition to a central foveation region, in the foveated domain, oneor more outer foveation regions that utilize lower pixel resolutionsthan the central foveation region may be identified in an image frame.In other words, in some embodiments, an outer foveation region in animage frame may be identified such that it is co-located with one ormore periphery regions of the field of view with which the image frameis expected to be viewed (e.g., visually perceived). In fact, leveragingthe gradual reduction in sensitivity to visible light outside the focusregion, in some embodiments, multiple outer foveation regions may beidentified in an image frame such that utilized pixel resolutiongradually decreases moving away from the central foveation regionidentified in the image frame.

For example, a first one or more outer foveation regions directlyadjacent the central foveation region may each utilize a pixelresolution that is half the pixel resolution of central foveation regionand, thus, the display panel. In other words, in the foveated domain,each image pixel (e.g., image data corresponding with point in image) inthe first one or more outer foveation regions may correspond with twodisplay pixels (e.g., sets of one or more color component sub-pixels)implemented on the display panel. Additionally, a second one or moreouter foveation regions outside of the first one or more outer foveationregions may each utilize a pixel resolution that is half the pixelresolution of the first one or more outer foveation regions and, thus, aquarter of the pixel resolution of the central foveation region and thedisplay panel. In other words, in the foveated domain, each image pixelin the second one or more outer foveation regions may correspond withfour display pixels (e.g., sets of one or more color componentsub-pixels) implemented on the display panel.

To facilitate improving processing efficiency, in some embodiments,image data may be processed by image processing circuitry at least inpart in the foveated domain. For example, a white point compensation(WPC) block (e.g., circuitry group) implemented in the image processingcircuitry may process image data in the foveated domain to facilitateaccounting for color variations (e.g., shifts) resulting fromenvironmental conditions, such as temperature (e.g., in addition tobacklight brightness level). However, the image processing circuitry mayalso include one or more other compensation blocks, such as a burn-incompensation (BIC) block and/or an optical cross-talk compensation(OXTC) block, that process image data to facilitate accounting forvariations between different display pixels (e.g., color componentsub-pixels) on a display panel and, thus, may be implemented and/oroperated to process image data in a panel (e.g., native) domain of thedisplay panel. In other words, in some embodiments, a first (e.g.,upstream) portion of the image processing circuitry may be implementedand/or operated to process image data in the foveated domain while asecond (e.g., downstream or different) portion of the image processingcircuitry is implemented and/or operated to process image data in thepanel domain.

As such, in some embodiments, image processing circuitry in anelectronic device may include a domain conversion block (e.g., circuitrygroup) that is implemented and/or operated to convert between a foveateddomain and a panel domain of a display panel used by the electronicdevice. In other words, the domain conversion block may convert imagedata between a pixel resolution used in a corresponding foveation regionand the (e.g., full) pixel resolution of the display panel. For example,when the pixel resolution used in a central foveation region matches thedisplay panel pixel resolution, image data (e.g., image pixels)corresponding with the central foveation region may pass through thedomain conversion block unchanged.

On the other hand, when the pixel resolution of an outer foveationregion is lower than the display panel resolution, the domain conversionblock may convert image data (e.g., image pixels) corresponding with theouter foveation region from the foveated domain to the panel domain atleast in part by outputting multiple instances of the image data. Forexample, the domain conversion block may convert image datacorresponding with a first one or more outer foveation regions, whichutilize a pixel resolution half the display panel resolution, to thepanel domain by outputting two instances of the image data such that afirst instance is associated with a first display pixel and a secondinstance is associated with a second display pixel. Similarly, thedomain conversion block may convert image data corresponding with asecond one or more outer foveation regions, which utilize a pixelresolution a quarter of the display panel resolution, to the paneldomain by outputting four instances of the image data, for example, to adownstream optical cross-talk compensation (OXTC) block for furtherprocessing. In this manner, as will be described in more detail below,the techniques described in present disclosure may facilitate reducingperceivability and/likelihood of color shift occurring in image contentdisplayed on a display panel, which, at least in some instances, mayfacilitate improving perceived quality of the displayed image contentand, thus, potentially the display panel, an electronic displayincluding the display panel, and/or an electronic device that utilizesthe display panel.

BRIEF DESCRIPTION OF THE DRAWINGS

Various aspects of the present disclosure may be better understood uponreading the following detailed description and upon reference to thedrawings in which:

FIG. 1 is a block diagram of an electronic device including one or moreelectronic displays, in accordance with an embodiment of the presentdisclosure;

FIG. 2 is an example of the electronic device of FIG. 1 , in accordancewith an embodiment of the present disclosure;

FIG. 3 is another example of the electronic device of FIG. 1 , inaccordance with an embodiment of the present disclosure;

FIG. 4 is another example of the electronic device of FIG. 1 , inaccordance with an embodiment of the present disclosure;

FIG. 5 is another example of the electronic device of FIG. 1 , inaccordance with an embodiment of the present disclosure;

FIG. 6 is another example of the electronic device of FIG. 1 , inaccordance with an embodiment of the present disclosure;

FIG. 7 is side (e.g., profile) view of an example portion of theelectronic device of FIG. 1 including a display panel, in accordancewith an embodiment of the present disclosure;

FIG. 8A is a diagrammatic representation of a perceived portion of lightemitted from a display pixel on the display panel of FIG. 7 that resultsfrom a first set of viewing characteristics, in accordance with anembodiment of the present disclosure;

FIG. 8B is a diagrammatic representation of a perceived portion of lightemitted from the display pixel on the display panel resulting from asecond (e.g., different) set of viewing characteristics, in accordancewith an embodiment of the present disclosure;

FIG. 9 is a top view of an example of a display panel used by theelectronic device of FIG. 1 , in accordance with an embodiment of thepresent disclosure;

FIG. 10 is a cross-sectional view of an example baseline display panel,in accordance with an embodiment of the present disclosure;

FIG. 11 is a plot illustrating color shift resulting from the baselinedisplay panel of FIG. 10 when viewed from various viewing angles, inaccordance with an embodiment of the present disclosure;

FIG. 12 is a flow diagram of an example process for designing (e.g.,tuning and/or calibrating) panel implementation parameters, inaccordance with an embodiment of the present disclosure;

FIG. 13 is a block diagram of an example of a design system thatfacilitates designing one or more panel implementation parameters of adisplay panel, in accordance with an embodiment of the presentdisclosure;

FIG. 14 is a cross-sectional view of an example display panelimplemented with reduced color filter cell thickness compared to thebaseline display panel of FIG. 10 , in accordance with an embodiment ofthe present disclosure;

FIG. 15 is a cross-sectional view of an example display panelimplemented with reduced encapsulation layer thickness compared to thebaseline display panel of FIG. 10 , in accordance with an embodiment ofthe present disclosure;

FIG. 16 is a cross-sectional view of an example display panelimplemented with reduced color filter cell thickness compared to thebaseline display panel of FIG. 10 and reduced encapsulation layerthickness compared to the baseline display panel of FIG. 10 , inaccordance with an embodiment of the present disclosure;

FIG. 17 is a plot illustrating color shift resulting from the reducedthickness display panel of FIG. 16 when viewed from various viewingangles, in accordance with an embodiment of the present disclosure;

FIG. 18 is a cross-sectional view of an example display panelimplemented with color filter cell footprints uniformly increasedcompared to the baseline display panel of FIG. 10 , in accordance withan embodiment of the present disclosure;

FIG. 19 is a plot illustrating color shift resulting from the uniformcolor filter cell footprint display panel of FIG. 18 when viewed fromvarious viewing angles, in accordance with an embodiment of the presentdisclosure;

FIG. 20 is a cross-sectional view of an example display panelimplemented with color filter cell footprints non-uniformly increasedcompared to the baseline display panel of FIG. 10 , in accordance withan embodiment of the present disclosure;

FIG. 21 is a plot illustrating color shift resulting from thenon-uniform color filter cell footprint display panel of FIG. 20 whenviewed from various viewing angles, in accordance with an embodiment ofthe present disclosure;

FIG. 22 is a cross-sectional view of an example display panelimplemented with reduced color filter cell thickness compared to thebaseline display panel of FIG. 10 , reduced encapsulation layerthickness compared to the baseline display panel of FIG. 10 , and colorfilter cell footprints uniformly increased compared to the baselinedisplay panel of FIG. 10 , in accordance with an embodiment of thepresent disclosure;

FIG. 23 is a plot illustrating color shift resulting from the reducedthickness uniform color filter cell footprint display panel of FIG. 22when viewed from various viewing angles, in accordance with anembodiment of the present disclosure;

FIG. 24 is a block diagram of an example portion of the electronicdevice of FIG. 1 including an electronic display and image processingcircuitry, in accordance with an embodiment of the present disclosure;

FIG. 25 is a diagrammatic representation of example image frame dividedinto multiple foveation regions, in accordance with an embodiment of thepresent disclosure;

FIG. 26 is a diagrammatic representation of an example optical crosstalk compensation factor map used by the image processing circuitry ofFIG. 24 , in accordance with an embodiment of the present disclosure;

FIG. 27 is a flow diagram of an example process for implementing theimage processing circuitry of FIG. 24 , in accordance with an embodimentof the present disclosure;

FIG. 28 is a block diagram of an example optical cross-talk compensation(OXTC) block that may be implemented in the image processing circuitryof FIG. 24 , in accordance with an embodiment of the present disclosure;and

FIG. 29 is a block diagram of an example process for operating theoptical cross-talk compensation (OXTC) block of FIG. 28 , in accordancewith an embodiment of the present disclosure.

DETAILED DESCRIPTION

One or more specific embodiments of the present disclosure will bedescribed below. These described embodiments are only examples of thepresently disclosed techniques. Additionally, in an effort to provide aconcise description of these embodiments, all features of an actualimplementation may not be described in the specification. It should beappreciated that in the development of any such actual implementation,as in any engineering or design project, numerousimplementation-specific decisions must be made to achieve thedevelopers' specific goals, such as compliance with system-related andbusiness-related constraints, which may vary from one implementation toanother. Moreover, it should be appreciated that such a developmenteffort might be complex and time consuming, but may nevertheless be aroutine undertaking of design, fabrication, and manufacture for those ofordinary skill having the benefit of this disclosure.

When introducing elements of various embodiments of the presentdisclosure, the articles “a,” “an,” and “the” are intended to mean thatthere are one or more of the elements. The terms “comprising,”“including,” and “having” are intended to be inclusive and mean thatthere may be additional elements other than the listed elements.Additionally, it should be understood that references to “oneembodiment” or “an embodiment” of the present disclosure are notintended to be interpreted as excluding the existence of additionalembodiments that also incorporate the recited features.

The present disclosure generally relates to electronic displays, whichmay be implemented and/or operated to present visual representations ofinformation by displaying one or more images (e.g., image frames and/orpictures) on its display panel. Accordingly, electronic devices, such ascomputers, mobile phones, portable media devices, tablets, televisions,virtual-reality headsets, and vehicle dashboards, among many others,often include and/or utilize one or more electronic displays. In anycase, an electronic display may generally display image content byactively controlling light emission from display pixels, which eachincludes one or more color component sub-pixels, implemented on itsdisplay panel based on corresponding image data, which is indicative oftarget characteristics (e.g., color and/or magnitude) of light emissiontherefrom.

For example, a display pixel in an electronic display may include one ormore red sub-pixels that control magnitude of red light emission fromthe display pixel, one or more blue sub-pixels that control magnitude ofblue light emission from the display pixel, one or more green sub-pixelsthat control magnitude of green light emission from the display pixel,one or more white sub-pixels that control magnitude of white lightemission from the display pixel, or any combination thereof.Additionally, an image pixel (e.g., image data corresponding with pointin image content) corresponding with the display pixel may include redcomponent image data (e.g., red grayscale level) indicative of targetred light emission from the display pixel, blue component image data(e.g., blue grayscale level) indicative of target blue light emissionfrom the display pixel, green component image data (e.g., greengrayscale level) indicative of target green light emission from thedisplay pixel, white component image data (e.g., white grayscale level)indicative of target white light emission from the display pixel, or anycombination thereof. In other words, to display image content at thedisplay pixel, the electronic display may actively control magnitude oflight emission from the one or more red sub-pixels of the display pixelbased on the red component image data, the magnitude of light emissionfrom the one or more green sub-pixels of the display pixel based on thegreen component image data, and so on.

Generally, magnitude of light emission from a display pixel (e.g., colorcomponent sub-pixel) varies with the amount of electrical energy storedtherein. For example, in some instances, a display pixel may include alight-emissive element, such as an organic light-emitting diode (OLED),that varies its light emission with current flow therethrough, a currentcontrol switching device (e.g., transistor) coupled between thelight-emissive element and a pixel power (e.g., V_(DD)) supply rail, anda storage capacitor coupled to a control (e.g., gate) terminal of thecurrent control switching device at an internal node of the displaypixel. As such, varying the amount of electrical energy stored in thestorage capacitor may vary voltage applied to the control input of thecurrent control switching device and, thus, magnitude of electricalcurrent supplied from the pixel power supply rail to the light-emissiveelement. In other words, at least in such instances, light emission froma display pixel may be controlled at least in part by controllingmagnitude of electrical power (e.g., voltage and/or current) supplied toits internal node.

However, it should be appreciated that the organic light-emitting diode(OLED) electronic display examples described in the present disclosureare merely intended to be illustrative and not limiting. In particular,it should be appreciated that the techniques described in the presentdisclosure may be applied to and/or implemented for other types ofelectronic displays. For example, the techniques may be adapted to aliquid crystal display (LCD) that uses a pixel electrode and a commonelectrode as a storage capacitor and a light-emitting diode (LED)backlight as a light-emissive element.

To facilitate controlling supply of electrical power and, thus,resulting light emission, an electronic display may include drivercircuitry electrically coupled its display pixels. For example, thedriver circuitry may include a scan (e.g., gate) driver electricallycoupled to each of the display pixels via a corresponding scan line anda data (e.g., source) driver electrically coupled to each of the displaypixels via a corresponding scan line. To write a display pixel (e.g.,color component sub-pixel), the scan driver may output an activation(e.g., logic high) control signal to a scan line coupled to the displaypixel, thereby causing the display pixel to electrically connect itsstorage capacitor to a data line coupled to the display pixel, and thedata driver may output an analog electrical (e.g., voltage and/orcurrent) signal to the data line based at least in part on correspondingimage data.

As described above, image data (e.g., image pixel in image content)corresponding with a display pixel on a display panel may be indicativeof target characteristics (e.g., color and/or magnitude) of lightemission therefrom, for example, by indicating one or more targetachromatic brightness (e.g., grayscale) levels (e.g., values) that aremapped to a light emission magnitude range associated with a panelbrightness setting used to display corresponding image content on thedisplay panel. Additionally, as described above, a display pixel mayinclude one or more color component sub-pixels, which are eachimplemented and/or operated to control light emission of a specificcolor. For example, a display pixel may include a red sub-pixel thatcontrols magnitude of red light emission from the display pixel, a greensub-pixel that controls magnitude of green light emission from thedisplay pixel, a blue sub-pixel that controls magnitude of blue lightemission from the display pixel, a white sub-pixel that controlsmagnitude of white light emission from the display pixel, or anycombination thereof.

To facilitate producing light of a target color, at least in someinstances, each color component sub-pixel implemented on a display panelmay include a color filter cell of an appropriate target color that isdisposed between a light-emissive element (e.g., OLED) and anoutward-facing viewing surface of the display panel. For example, a redsub-pixel may include a red color filter cell disposed over a redorganic light-emitting diode, a green sub-pixel may include a greencolor filter cell disposed over a green organic light-emitting diode, ablue sub-pixel may include a blue color filter cell disposed over a blueorganic light-emitting diode, a white sub-pixel may include a whitecolor filter cell disposed over a white organic light-emitting diode, orany combination thereof. Additionally, at least in some instances, anencapsulation layer, such as thin film encapsulation (TFE) layer, may beformed over the light-emissive elements, for example, to separate one ormore light-emissive elements (e.g., OLEDs) from the color filter layer.Thus, at least in such instances, a light ray emitted from alight-emissive element of a color component sub-pixel may pass throughthe encapsulation layer and the color filter layer before exiting theoutward-facing viewing surface of the display panel.

Generally, light emitted from a light source, such as an organiclight-emitting diode of a color component sub-pixel, radiates outwardlyfrom the light source, for example, in a conical shape. As such,magnitude of light emission is generally strongest along a normal axisof the light source and weakens the farther the emission angle deviatesfrom the normal axis. Accordingly, color filter cells are oftenimplemented such that their footprints (e.g., width, length, and/orpitch) are centered on the normal axes of corresponding light-emissiveelements, for example, to facilitate maximizing perceived brightnessresulting from actual light emission of the light-emissive elements whenthe display panel is viewed by a user's (e.g., human's) eye with aviewing angle of zero (e.g., pupil oriented perpendicular to displaypanel and/or along normal axis of display panel).

A human's eye generally perceives visible light due to interaction ofcones (e.g., photoreceptor cells) in its retina with corresponding lightrays. However, a human's eye generally has a limited field of view(FOV), which is centered on its viewing (e.g., gaze or pupil) angle. Dueto its limited field of view, at least in some instances, a human's eyemay perceive a first portion of light emitted from a display pixel, butnot a second portion of the light emitted from the display pixel, forexample, due to light rays in the second portion of the emitted lightnot actually reaching the eye's retina and, thus, being outside itsfield of view. In other words, luminance perceived by a human's eye maygenerally be dependent on its field of view.

However, the field of view of a human's eye may generally vary with itsviewing characteristics, such as viewing (e.g., gaze or pupil) angle,viewing location (e.g., pupil offset from center and/or pupil relief),and/or viewing aperture (e.g., pupil or eye box) size. For example,orientation (e.g., direction) of the field of view of a human's eye maybe dependent on its gaze (e.g., viewing or pupil) angle and, thus, achange in its gaze angle (e.g., due to eye rotation) may changeorientation of its field of view. Additionally or alternatively, size(e.g., span) of the field of view of a human's eye may be dependent onits pupil (e.g., viewing aperture or eye box) size and, thus, a changein its pupil size may change the size of its field of view.

Moreover, the sensitivity of a human's eye to visible light generallyvaries across its field of view. In particular, a central portion (e.g.,fovea) of an eye's retina is generally more sensitive to visible lightcompared to a peripheral (e.g., outer) portion of the eye's retina, forexample, due to the central portion of the retina including more and/ordenser cones while the peripheral portion includes fewer and/or lessdense cones. To facilitate accounting for the variation in sensitivityto visible light, at least in some instances, the field of view of ahuman's eye may be divided into a focus (e.g., foveal or highresolution) region, which is centered on its viewing angle,corresponding with the central portion of the eye's retina and one ormore periphery (e.g., non-foveal or low resolution) regions, which areoutside the focus region, corresponding with the peripheral portion ofthe eye's retina.

In other words, at least in some instances, the portion of light emittedfrom a display pixel (e.g., color component sub-pixel) that is actuallyperceived by a user's (e.g., human's) eye may vary with its field ofview and, thus, its viewing characteristics (e.g., angle, location,and/or aperture size) that resulted in the field of view. For example, acolor component sub-pixel may appear brighter when viewed from a viewingangle of zero (e.g., pupil oriented along normal axis) and darker whenviewed from a non-zero viewing angle (e.g., pupil orientation differentfrom normal axis). In fact, due to spatial offset between colorcomponent sub-pixels implemented on a display panel, a user's eye mayconcurrently view multiple color component sub-pixels with differentviewing angles. In other words, at least in some instances, a firstcolor component sub-pixel may appear brighter and a second colorcomponent sub-pixel may appear darker when the display panel is viewedwith a first viewing angle whereas the first color component sub-pixelmay appear darker and the second color component sub-pixel may appearbrighter when the display panel is viewed with a second (e.g.,different) viewing angle. Since a user's eye generally perceivesdifferent colors by averaging perceived light emission from multiplecolor component sub-pixels, at least in some instances, variations inperceived luminance of color component sub-pixels resulting fromdifferent sets of viewing characteristics may produce a perceivablecolor shift in image content displayed on the display panel.

Furthermore, as described above, a display panel may include anencapsulation layer implemented between a light-emissive element, suchas an organic light-emitting diode (OLED) of a color componentsub-pixel, and a color filter layer and, thus, light rays emitted fromthe light-emissive element pass through the encapsulation layer and thecolor filter layer before exiting an outward-facing viewing surface ofthe display panel. Additionally, as described above, light emitted froma light source, such as a light-emissive element (e.g., OLED) of a colorcomponent sub-pixel, generally radiates outwardly from the light source,for example, in a conical shape. In fact, due to radiation (e.g.,spread) of light rays emitted from a light-emissive element of a colorcomponent sub-pixel and the distance the light rays travel beforeexiting the color filter layer, at least in some instances, a portion ofthe light rays emitted from the light-emissive element of the colorcomponent sub-pixel may actually pass through a color filter cell of aneighboring (e.g., different colored) color component sub-pixel, therebyproducing optical cross-talk. For example, a portion of light emittedfrom an organic light-emitting diode of a red sub-pixel may pass througha red color filter cell of the red sub-pixel while another portion ofthe light emitted from the organic light-emitting diode passes through agreen color filter cell of a neighboring green sub-pixel.

When color filter cell footprints are centered over correspondinglight-emissive elements, viewing a display panel with a viewing angle ofzero generally results in the light that is emitted from thelight-emissive elements and actually perceived by a user's (e.g.,human's) eye passing through appropriately colored color filter cells.However, as viewing angle moves away from zero, a user's eye may end upperceiving more of the light that passes through a neighboring (e.g.,inappropriately colored) color filter cell, thereby increasingperceivability of color shift resulting from optical cross-talk. Inother words, different sets of viewing characteristics may affect theresulting field of view and, thus, color of light emitted from a displaypanel that is actually perceived by a user's eye, which, at least insome instances, may result in a perceivable color shift in image contentdisplayed on the display panel. That is, the color shift may result in aperceived color in image content displayed on a display panelperceivably differing from a corresponding target color, which, at lastin some instances, may affect perceived quality of the image contentand, thus, potentially the display panel displaying the image content,an electronic display including the display panel, and/or an electronicdevice including the display panel.

Accordingly, to facilitate improving perceived quality, the presentdisclosure provides techniques for implementing and/or operating anelectronic device to reduce perceivability and/or likelihood of a colorshift occurring in displayed image content, for example, due to opticalcross-talk between neighboring (e.g., differently colored) colorcomponent sub-pixels. In particular, the present disclosure providestechniques for implementing and/or operating the electronic device toadaptively process image data to facilitate compensating for (e.g.,offsetting) color shift expected to result from optical cross-talk.Additionally, the present disclosure provides techniques forimplementing (e.g., designing and/or manufacturing) a display panel ofan electronic display included in and/or used by the electronic deviceto facilitate reducing optical cross-talk and, thus, resulting colorshift.

In addition to a display panel and driver circuitry, in someembodiments, an electronic display may include a lens disposed over(e.g., overlaid on or overlapping) its display panel. In particular, insome such embodiments, the lens may be a convex-concave (e.g., meniscus)lens that focuses light emitted from the display panel, for example, tofacilitate presenting virtual (e.g., virtual reality and/or augmentedreality) image content. In other such embodiments, the lens may be abiconvex lens, a biconcave lens, a plano-convex lens, or a plano-concavelens. However, regardless of whether a lens is implemented in front ofthe display panel, optical cross-talk and, thus, perceivable color shiftmay occur under different viewing characteristics. In other words, thetechniques described in the present disclosure may be applied tofacilitate reducing optical cross-talk and, thus, resulting color shiftin electronic displays that includes a lens as well as electronicdisplays that do not include a lens.

As described above, optical cross-talk may result due to light emittedfrom a light-emissive element, such as an organic light-emitting diode(OLED), of a color component sub-pixel that passes through a neighboring(e.g., inappropriately colored) color filter cell actually beingperceived by a user's (e.g., human's) eye. Moreover, as described above,light emitted from a light-emissive element of a color componentsub-pixel may pass through the color filter cell of a neighboring colorcomponent sub-pixel due to emitted light rays radiating (e.g.,spreading) outwardly. In other words, since spread of light rays emittedfrom a light source generally increases as distance traveled by thelight rays increases, the amount of light emitted from a light-emissiveelement of a color component sub-pixel that passes through the colorfilter cell of a neighboring color component sub-pixel may be dependenton the distance the light travels before exiting the color filter layer.

As such, to facilitate reducing color shift resulting from opticalcross-talk, in some embodiments, panel implementation parameters may beadjusted to facilitate reducing the distance light rays emitted from alight-emissive element of a color component sub-pixel on a display paneltravel before exiting a color filter layer of the display panel, forexample, via a design and/or manufacturing process. In particular, insome such embodiments, the panel implementation parameters may beadjusted to reduce thickness (e.g., height) of an encapsulation layerformed between the light-emissive element and the color filter layer.For example, a design process may adjust current (e.g., baseline) panelimplementation parameters such that thickness of the encapsulation layeris reduced from a first (e.g., baseline) thickness (e.g., twomicrometers) to a second (e.g., adjusted or reduced) thickness (e.g.,one micrometer).

Additionally or alternatively, panel implementation parameters may beadjusted to change the size of one or more color filter cellsimplemented in a color filter layer of a display panel, for example, viaa design and/or manufacturing process. In particular, to facilitatereducing the distance light rays emitted from a light-emissive elementof a color component sub-pixel travel before exiting the color filterlayer, in some embodiments, the panel implementation parameters may beadjusted to reduce thickness (e.g., height) of one or more color filtercells implemented in the color filter layer. For example, a designprocess may adjust current (e.g., baseline) panel implementationparameters such that thickness of a color filter cell is reduced from afirst (e.g., baseline) thickness (e.g., two micrometers) to a second(e.g., adjusted or reduced) thickness (e.g., one micrometer). In fact,in some embodiments, the panel implementation parameters may be adjustedsuch that thickness of the color filter cell in the color filter layeras well as thickness of the encapsulation layer are both reduced. Inthis manner, the panel implementation parameters used to implement adisplay panel may be adjusted to facilitate reducing the distance lightrays emitted from a light-emissive element of a color componentsub-pixel travel before exiting a color filter layer, which, at least insome instances, may facilitate reducing the amount of light that passesthrough a neighboring color filter cell and, thus, optical cross-talkand resulting color shift.

Moreover, to facilitate reducing color shift resulting from opticalcross-talk, in some embodiments, panel implementation parameters mayadditionally or alternatively be adjusted to change the footprint (e.g.,width, length, and/or pitch) of one or more color filter cellsimplemented in a color filter layer of a display panel, for example, viaa design and/or manufacturing process. In particular, in someembodiments, the panel implementation parameters may be adjusted suchthat footprint of each color filter cell implemented in the color filterlayer is uniformly changed. For example, a design process may adjust thepanel implementation parameters such that pitch (e.g., width or length)of each color filter cell is increased from a baseline pitch by the sameamount (e.g., one nanometer).

In some embodiments, an adjusted footprint color filter layer maynevertheless be centered on a display panel. In other words, in suchembodiments, an increase in footprint of a color filter cell may resultin another (e.g., neighboring) color filter cell being shiftedoutwardly. In fact, in some embodiments, the footprint increase and/orthe positional shift resulting from the footprint increase may result ina color filter cell of a color component sub-pixel at least partiallyoverlapping a light-emissive element (e.g., OLED) of a neighboring colorcomponent sub-pixel. For example, when footprint of each color filtercell is uniformly increased, the amount of overlap between alight-emissive element of a color component sub-pixel and a color filtercell of a neighboring color component sub-pixel may generally be lowertowards the center of the display panel and increase moving away fromthe center of the display panel.

In other words, adjusting color filter cell footprint may change theportion of light emitted from a light-emissive element of a colorcomponent sub-pixel that passes through a color filter cell of aneighboring color component sub-pixel. However, at least in someinstances, adjusting color filter cell footprint too much may actuallyincrease perceivable color shift. For example, adjusting the panelimplementation parameters to double the baseline footprint of a colorfilter cell in a color component sub-pixel may result in the colorfilter cell completely overlapping an organic light-emitting diode(OLED) of a neighboring (e.g., different colored) color componentsub-pixel.

Accordingly, to facilitate improving perceived image quality, in someembodiments, a uniform adjustment to color filter cell footprint may beoptimized for a focus region in the field of view (FOV) of a user's(e.g., human's) eye resulting from various sets of viewingcharacteristics, for example, to facilitate reducing the amount of lightpassing through a neighboring (e.g., inappropriately colored) colorfilter cell that is perceived in the focus region. However, at least insome instances, a uniform adjustment to color filter cell footprint mayresult in a color shift spike (e.g., non-monotonic change) in aperiphery region of the field of view of a user's eye when the displaypanel is viewed with a non-zero viewing angle, for example, due to thenon-zero viewing angle resulting in light emitted from a light-emissiveelement of a central color component sub-pixel that passes through acolor filter cell of neighboring color component sub-pixel beingperceived in the periphery region. Although some amount of color shiftin a periphery region of the field of view may be acceptable, a colorshift spike may generally be more perceivable than a monotonicallychanging color shift.

To facilitate further improving perceived image quality, in otherembodiments, panel implementation parameters may be adjusted such thatcolor filter cell footprints are non-uniformly adjusted, for example,via a design and/or manufacturing process. In other words, in some suchembodiments, the footprint of different color filter cells may beadjusted from a baseline footprint by different amounts. In particular,to facilitate reducing color shift spikes resulting in a peripheryregion of a field of view when a display panel is viewed with a non-zeroviewing angle, in some embodiments, footprint of color filter cells maygradually increase moving from the center of the display panel toward anedge (e.g., side) of the display panel. For example, a design processmay adjust current (e.g., baseline) panel implementation parameters suchthat the color filter cell footprint of a central color componentsub-pixel is maintained at the baseline footprint and color filter cellfootprint of a first non-central color component is increased from thebaseline footprint by a first amount. Additionally, the design processmay adjust current panel implementation parameters such that the colorfilter cell footprint of a second non-central color component sub-pixel,which is farther from the central color component sub-pixel than thefirst non-central color component sub-pixel, is increased from thebaseline footprint by a second amount greater than the first amount.

In other words, varying color filter cell footprint in this manner mayfacilitate reducing the amount of overlap between light-emissiveelements (e.g., OLEDs) of central color component sub-pixels withneighboring (e.g., inappropriately colored) color filter cells whileincreasing the amount of overlap between light-emissive elements ofouter (e.g., non-central) color component sub-pixels with neighboringcolor filter cells. As such, when a display panel is viewed with anon-zero viewing angle that results in a central color componentsub-pixel being perceived in a periphery region of a resulting field ofview, the reduced amount of overlap may facilitate reducing the amountof light emitted from a light-emissive element (e.g., OLEDs) of thecentral color component sub-pixel that passes through a neighboringcolor filter cell and is perceived in the periphery region of the fieldof view. However, as described above, at least in some instances,adjusting color filter cell footprint too much may actually increasecolor shift.

Accordingly, to facilitate improving perceived image quality, in someembodiments, a non-uniform adjustment to color filter cell footprint maybe optimized for field of view (FOV) of a user's (e.g., human's) eyeresulting from various sets of viewing characteristics, for example, tobalance reduction in the amount of light passing through neighboringcolor filter cell that is perceived in a focus region of a field of viewwith reduction in the amount of light passing through the neighboringcolor filter cell (e.g., color shift spike) that is perceived in aperiphery region of the field of view. In fact, in some embodiments,panel implementation parameters may be adjusted to change footprint ofone or more color filter cells in a color filter layer while alsoreducing the distance light rays emitted from a light-emissive elementof a color component sub-pixel travel before exiting the color filterlayer, for example, via a design and/or manufacturing process. Merely asan illustrative example, current (e.g., baseline) panel implementationparameters may be adjusted to reduce thickness (e.g., height) of eachcolor filter cell and/or an encapsulation layer from a baselinethickness while uniformly increasing footprint of each color filter cellfrom a baseline color filter cell footprint, which, at least in someinstances, may facilitate reducing perceivability and/or likelihood of acolor shift spike resulting in a periphery region of a field of view.Although implementing a display panel of an electronic display in thismanner may facilitate reducing color shift, at least in some instances,some amount of color shift may nevertheless be perceivable in imagecontent displayed on the display panel.

To facilitate further improving perceived image quality, in someembodiments, an electronic device may include image processing circuitryimplemented and/or operated to process image data before processed(e.g., display) image data is supplied to an electronic display todisplay corresponding image content. For example, the image processingcircuitry may include a burn-in compensation (BIC) block (e.g.,circuitry group), which is implemented and/or operated to process imagedata to facilitate accounting for light emission variations resultingfrom display pixel aging (e.g., burn-in), and/or a white pointcompensation (WPC) block (e.g., circuitry group), which is implementedand/or operated to process image data to facilitate accounting for colorvariations (e.g., shifts) resulting from environmental conditions, suchas temperature (e.g., in addition to backlight brightness level).Moreover, to facilitate reducing color shift resulting from opticalcross-talk, the image processing circuitry may include an opticalcross-talk compensation (OXTC) block (e.g., circuitry group), which isimplemented and/or operated to process image data based at least in parton optical cross-talk compensation parameters.

To facilitate compensating for (e.g., offsetting) color shift resultingfrom optical cross-talk, in some embodiments, the optical cross-talkcompensation (OXTC) parameters may include one or more opticalcross-talk compensation factor maps, which each explicitly associates(e.g., maps) one or more pixel positions on a display panel to one ormore optical cross-talk compensation factors (e.g., offset values and/orgain values) to be applied to image data corresponding with a displaypixel at the pixel position. In fact, in some embodiments, an opticalcross-talk compensation factor map may explicitly associate a pixelposition with a set of multiple optical cross-talk compensation factors.For example, the optical cross-talk compensation factors associated witha pixel position may be indicated as a three-by-three matrix, whichincludes a red optical cross-talk compensation factor, a red-to-greenoptical cross-talk compensation factor, a red-to-blue optical cross-talkcompensation factor, a green-to-red optical cross-talk compensationfactor, a green optical cross-talk compensation factor, a green-to-blueoptical cross-talk compensation factor, a blue-to-red optical cross-talkcompensation factor, a blue-to-green optical cross-talk compensationfactor, and a blue optical cross-talk compensation factor. Thus, wheninput image data associated with the pixel position is received, theoptical cross-talk compensation block may apply each of the multipleoptical cross-talk compensation factors to the input image data, forexample, by multiplying the three-by-three matrix with a three-by-onematrix (e.g., vector) including red component input image data, greencomponent input image data, and blue component input image data.

Moreover, in some embodiments, an optical cross-talk compensation factormap to be used by image processing circuitry of an electronic device maybe stored in the electronic device, for example, in memory. In otherwords, in such embodiments, size of the optical cross-talk compensationfactor map may affect the amount of storage capacity available in theelectronic device. As such, to facilitate conserving (e.g., optimizing)storage capacity of the electronic device, in some embodiments, anoptical cross-talk compensation factor map may explicitly associate eachof a subset of pixel positions on a display panel with one or morecorresponding optical cross-talk compensation factors. In other words,in such embodiments, one or more pixel positions on the display paneland, thus, corresponding optical cross-talk compensation factors may notbe explicitly identified in the optical cross-talk compensation factormap.

When a pixel position is not explicitly identified in an opticalcross-talk compensation factor map, the optical cross-talk compensationblock may determine an optical cross-talk compensation factor to beapplied to image data corresponding with the pixel position byinterpolating optical cross-talk compensation factors associated withother pixel positions explicitly identified in the optical cross-talkcompensation factor map, for example, using linear interpolation,bi-linear interpolation, spline interpolation, and/or the like. Asdescribed above, in some embodiments, a pixel position may be associatedwith a set of multiple optical cross-talk compensation factors. In suchembodiments, when a pixel position is not explicitly identified in anoptical cross-talk compensation factor map, the optical cross-talkcompensation block may determine a set of optical cross-talkcompensation factor to be applied to image data corresponding with thepixel position by interpolating sets of optical cross-talk compensationfactors associated with other pixel positions explicitly identified inthe optical cross-talk compensation factor map. For example, the opticalcross-talk compensation block may determine a red optical cross-talkcompensation factor to be applied to image data corresponding with thepixel position by interpolating red optical cross-talk compensationfactors associated with other pixel positions explicitly identified inthe optical cross-talk compensation factor map, a red-to-green opticalcross-talk compensation factor to be applied to image data correspondingwith the pixel position by interpolating red-to-green optical cross-talkcompensation factor associated with the other pixel positions explicitlyidentified in the optical cross-talk compensation factor map, and so on.

However, at least in some instances, interpolation may result in someamount of error. In fact, interpolation error generally increases asinterpolation distance increases. Moreover, at least in some instances,susceptibility to perceivable color shift may vary across a displaypanel. For example, an outer (e.g., side) portion of the display panelmay be more susceptible to perceivable color shift than a centralportion of the display panel due to panel implementation parametersbeing optimized for a viewing angle of zero (e.g., pupil oriented alongnormal axis of display panel). To facilitate accounting for variation incolor shift susceptibility and interpolation error, in some embodiments,the pixel positions on a display panel explicitly identified in anoptical cross-talk compensation factor map may be non-uniformly spaced(e.g., distributed). For example, the optical cross-talk compensationfactor map may utilize a finer granularity for the outer portion of thedisplay panel by explicitly identifying more pixel positions per area inthe outer portion and utilize a coarser granularity for the centralportion of the display panel by explicitly identifying fewer pixelpositions per area in the central portion.

In some embodiments, a single (e.g., static) optical cross-talkcompensation factor map may be calibrated to a display panel to accountfor multiple different sets of viewing characteristics, for example,which each includes a viewing (e.g., pupil or gaze) angle, a viewinglocation (e.g., pupil offset from center and/or pupil relief), and aviewing aperture (e.g., pupil or eye box) size. However, as describedabove, a resulting field of view and, thus, perceivability of colorshift resulting from optical cross-talk generally varies when a displaypanel is viewed using different sets of viewing characteristics. Assuch, to facilitate improving efficacy of optical cross-talkcompensation, in other embodiments, the optical cross-talk compensationblock may include and/or have access to multiple candidate opticalcross-talk compensation factor maps, which are each calibrated for adifferent set of viewing characteristics. In other words, in suchembodiments, the optical cross-talk compensation block may select adifferent candidate optical cross-talk compensation factor map as atarget candidate optical cross-talk compensation factor map underdifferent sets of viewing characteristics and, thus, adaptively adjustprocessing of input image data.

To facilitate adaptively adjusting processing performed on image data,in some embodiments, an optical cross-talk compensation block mayreceive one or more viewing characteristic parameters indicative of aset of viewing characteristics with which a display panel to be used todisplay corresponding image content is expected to be viewed, forexample, from an eye (e.g., pupil) tracking sensor (e.g., camera). Inparticular, in some embodiments, the viewing characteristic parametersmay indicate a horizontal (e.g., x-direction) offset of pupil positionfrom a default (e.g., forward-facing) pupil position and a vertical(e.g., y-direction) offset of pupil position from the default pupilposition and, thus, may be indicative of expected viewing angle.Additionally, in some embodiments, the viewing characteristic parametersmay indicate a pupil relief (e.g., distance from pupil to display panel)and, thus, may be indicative of expected viewing location. Furthermore,in some embodiments, the viewing characteristic parameters may indicatea pupil size and, thus, may be indicative of expected viewing aperturesize.

In addition to an optical cross-talk compensation block, as describedabove, image processing circuitry implemented in an electronic devicemay include one or more other compensation blocks, such as a white pointcompensation (WPC) block and/or a burn-in compensation (BIC) block. Insome embodiments, the various compensation blocks (e.g., circuitrygroups) may be implemented in a hardware pipeline and, thus, seriallyprocess image data. Additionally, before processing by image processingcircuitry of an electronic device, in some embodiments, image data maybe stored in the electronic device, for example, in memory. Furthermore,as described above, the field of view (FOV) of a human's (e.g., user's)eye generally includes a focus region that is more sensitive to visiblelight and one or more periphery regions outside the focus region thatare less sensitive to visible light.

Leveraging the reduced sensitivity outside the focus region, in someembodiments, image data may be stored in a foveated (e.g., compressed orgrouped) domain that utilizes a pixel resolution different from (e.g.,lower than) a panel (e.g., native or non-foveated) domain of a displaypanel to be used to display corresponding image content, for example, tofacilitate conserving (e.g., optimizing) storage capacity of theelectronic device. In particular, in the foveated domain, an image framemay be divided in multiple foveation regions (e.g., tiles) in whichdifferent pixel resolutions are utilized. For example, a central (e.g.,first) foveation region may be identified in an image frame such that itis co-located with a focus (e.g., foveal) region of the field of viewwith which the image frame is expected to be viewed (e.g., visuallyperceived). Since the sensitivity to visible light in the focus regionis higher, in some embodiments, the central foveation region may utilizea pixel resolution that matches the (e.g., full) pixel resolution of thedisplay panel. In other words, in such embodiments, each image pixel(e.g., image data corresponding with point in image) in the centralfoveation region of the image frame may correspond with single displaypixel (e.g., set of one or more color component sub-pixels) implementedon the display panel.

In addition to a central foveation region, in the foveated domain, oneor more outer foveation regions that utilize lower pixel resolutionsthan the central foveation region may be identified in an image frame.In other words, in some embodiments, an outer foveation region in animage frame may be identified such that it is co-located with one ormore periphery regions of the field of view with which the image frameis expected to be viewed (e.g., visually perceived). In fact, leveragingthe gradual reduction in sensitivity to visible light outside the focusregion, in some embodiments, multiple outer foveation regions may beidentified in an image frame such that utilized pixel resolutiongradually decreases moving away from the central foveation regionidentified in the image frame.

For example, a first one or more outer foveation regions directlyadjacent the central foveation region may each utilize a pixelresolution that is half the pixel resolution of central foveation regionand, thus, the display panel. In other words, in the foveated domain,each image pixel (e.g., image data corresponding with point in image) inthe first one or more outer foveation regions may correspond with twodisplay pixels (e.g., sets of one or more color component sub-pixels)implemented on the display panel. Additionally, a second one or moreouter foveation regions outside of the first one or more outer foveationregions may each utilize a pixel resolution that is half the pixelresolution of the first one or more outer foveation regions and, thus, aquarter of the pixel resolution of the central foveation region and thedisplay panel. In other words, in the foveated domain, each image pixelin the second one or more outer foveation regions may correspond withfour display pixels (e.g., sets of one or more color componentsub-pixels) implemented on the display panel.

To facilitate improving processing efficiency, in some embodiments,image data may be processed by image processing circuitry at least inpart in the foveated domain. For example, a white point compensation(WPC) block (e.g., circuitry group) implemented in the image processingcircuitry may process image data in the foveated domain to facilitateaccounting for color variations (e.g., shifts) resulting fromenvironmental conditions, such as temperature (e.g., in addition tobacklight brightness level). However, the image processing circuitry mayalso include one or more other compensation blocks, such as a burn-incompensation (BIC) block and/or an optical cross-talk compensation(OXTC) block, that process image data to facilitate accounting forvariations between different display pixels (e.g., color componentsub-pixels) on a display panel and, thus, may be implemented and/oroperated to process image data in a panel (e.g., native) domain of thedisplay panel. In other words, in some embodiments, a first (e.g.,upstream) portion of the image processing circuitry may be implementedand/or operated to process image data in the foveated domain while asecond (e.g., downstream or different) portion of the image processingcircuitry is implemented and/or operated to process image data in thepanel domain.

As such, in some embodiments, image processing circuitry in anelectronic device may include a domain conversion block (e.g., circuitrygroup) that is implemented and/or operated to convert between a foveateddomain and a panel domain of a display panel used by the electronicdevice. In other words, the domain conversion block may convert imagedata between a pixel resolution used in a corresponding foveation regionand the (e.g., full) pixel resolution of the display panel. For example,when the pixel resolution used in a central foveation region matches thedisplay panel pixel resolution, image data (e.g., image pixels)corresponding with the central foveation region may pass through thedomain conversion block unchanged.

On the other hand, when the pixel resolution of an outer foveationregion is lower than the display panel resolution, the domain conversionblock may convert image data (e.g., image pixels) corresponding with theouter foveation region from the foveated domain to the panel domain atleast in part by outputting multiple instances of the image data. Forexample, the domain conversion block may convert image datacorresponding with a first one or more outer foveation regions, whichutilize a pixel resolution half the display panel resolution, to thepanel domain by outputting two instances of the image data such that afirst instance is associated with a first display pixel and a secondinstance is associated with a second display pixel. Similarly, thedomain conversion block may convert image data corresponding with asecond one or more outer foveation regions, which utilize a pixelresolution a quarter of the display panel resolution, to the paneldomain by outputting four instances of the image data, for example, to adownstream optical cross-talk compensation (OXTC) block for furtherprocessing. In this manner, as will be described in more detail below,the techniques described in present disclosure may facilitate reducingperceivability and/likelihood of color shift occurring in image contentdisplayed on a display panel, which, at least in some instances, mayfacilitate improving perceived quality of the displayed image contentand, thus, potentially the display panel, an electronic displayincluding the display panel, and/or an electronic device that utilizesthe display panel.

To help illustrate, an example of an electronic device 10, whichincludes and/or utilizes one or more electronic displays 12, is shown inFIG. 1 . As will be described in more detail below, the electronicdevice 10 may be any suitable electronic device, such as a computer, amobile (e.g., portable) phone, a portable media device, a tablet device,a television, a handheld game platform, a personal data organizer, avirtual-reality headset, a mixed-reality headset, a vehicle dashboard,and/or the like. Thus, it should be noted that FIG. 1 is merely oneexample of a particular implementation and is intended to illustrate thetypes of components that may be present in an electronic device 10.

In addition to the electronic display 12, as depicted, the electronicdevice 10 includes one or more input devices 14, one or moreinput/output (I/O) ports 16, a processor core complex 18 having one ormore processors or processor cores, main memory 20, one or more storagedevices 22, a network interface 24, a power supply 26, and imageprocessing circuitry 27. The various components described in FIG. 1 mayinclude hardware elements (e.g., circuitry), software elements (e.g., atangible, non-transitory computer-readable medium storing instructions),or a combination of both hardware and software elements. It should benoted that the various depicted components may be combined into fewercomponents or separated into additional components. For example, themain memory 20 and a storage device 22 may be included in a singlecomponent. Additionally or alternatively, the image processing circuitry27 may be included in the processor core complex 18 or the electronicdisplay 12.

As depicted, the processor core complex 18 is operably coupled with mainmemory 20 and a storage device 22. As such, in some embodiments, theprocessor core complex 18 may execute instructions stored in main memory20 and/or the storage device 22 to perform operations, such asgenerating image data in a foveated (e.g., grouped or compressed)domain. Additionally or alternatively, the processor core complex 18 mayoperate based on circuit connections formed therein. As such, in someembodiments, the processor core complex 18 may include one or moregeneral purpose microprocessors, one or more application specificprocessors (ASICs), one or more field programmable logic arrays (FPGAs),or any combination thereof.

In addition to instructions, in some embodiments, the main memory 20and/or the storage device 22 may store data, such as image data. Thus,in some embodiments, the main memory 20 and/or the storage device 22 mayinclude one or more tangible, non-transitory, computer-readable mediathat store instructions executable by processing circuitry, such as theprocessor core complex 18 and/or the image processing circuitry 27,and/or data to be processed by the processing circuitry. For example,the main memory 20 may include random access memory (RAM) and thestorage device 22 may include read only memory (ROM), rewritablenon-volatile memory, such as flash memory, hard drives, optical discs,and/or the like.

As depicted, the processor core complex 18 is also operably coupled withthe network interface 24. In some embodiments, the network interface 24may enable the electronic device 10 to communicate with a communicationnetwork and/or another electronic device 10. For example, the networkinterface 24 may connect the electronic device 10 to a personal areanetwork (PAN), such as a Bluetooth network, a local area network (LAN),such as an 802.11x Wi-Fi network, and/or a wide area network (WAN), suchas a 4G or LTE cellular network. In other words, in some embodiments,the network interface 24 may enable the electronic device 10 to transmitdata (e.g., image data) to a communication network and/or receive datafrom the communication network.

Additionally, as depicted, the processor core complex 18 is operablycoupled to the power supply 26. In some embodiments, the power supply 26may provide electrical power to operate the processor core complex 18and/or other components in the electronic device 10, for example, viaone or more power supply rails. Thus, the power supply 26 may includeany suitable source of electrical power, such as a rechargeable lithiumpolymer (Li-poly) battery and/or an alternating current (AC) powerconverter.

Furthermore, as depicted, the processor core complex 18 is operablycoupled with one or more I/O ports 16. In some embodiments, an I/O port16 may enable the electronic device 10 to interface with anotherelectronic device 10. For example, a portable storage device may beconnected to an I/O port 16, thereby enabling the electronic device 10to communicate data, such as image data, with the portable storagedevice.

As depicted, the processor core complex 18 is also operably coupled withone or more input devices 14. In some embodiments, an input device 14may enable a user to interact with the electronic device 10. Forexample, the input devices 14 may include one or more buttons, one ormore keyboards, one or more mice, one or more trackpads, and/or thelike. Additionally or alternatively, the input devices 14 may includetouch sensing components implemented in the electronic display 12. Insuch embodiments, the touch sensing components may receive user inputsby detecting occurrence and/or position of an object contacting thedisplay surface of the electronic display 12.

In addition to enabling user inputs, the electronic display 12 mayfacilitate providing visual representations of information by displayingone or more images (e.g., image frames or pictures). For example, theelectronic display 12 may display a graphical user interface (GUI) of anoperating system, an application interface, text, a still image, orvideo content. To facilitate displaying images, the electronic display12 may include one or more display pixels. Additionally, in someembodiments, each display pixel may include one or more color componentsub-pixels, which each controls light emission of a specific color(e.g., red, blue, green, or white).

As described above, an electronic display 12 may display an image bycontrolling light emission from its display pixels based at least inpart on image data associated with corresponding image pixels (e.g.,points) in the image. In some embodiments, image data may be generatedby an image source, such as the processor core complex 18, a graphicsprocessing unit (GPU), and/or an image sensor. Additionally oralternatively, image data may be received from another electronic device10, for example, via the network interface 24 and/or an I/O port 16. Inany case, as described above, the electronic device 10 may be anysuitable electronic device.

To help illustrate, an example of a suitable electronic device 10,specifically a handheld device 10A, is shown in FIG. 2 . In someembodiments, the handheld device 10A may be a portable phone, a mediaplayer, a personal data organizer, a handheld game platform, and/or thelike. Merely for illustrative purposes, the handheld device 10A may be asmart phone, such as any iPhone® model available from Apple Inc.

As depicted, the handheld device 10A includes an enclosure 28 (e.g.,housing). In some embodiments, the enclosure 28 may protect interiorcomponents from physical damage and/or shield them from electromagneticinterference. Additionally, as depicted, the enclosure 28 surrounds theelectronic display 12. In the depicted embodiment, the electronicdisplay 12 is displaying a graphical user interface (GUI) 30 having anarray of icons 32. By way of example, when an icon 32 is selected eitherby an input device 14 or a touch sensing component of the electronicdisplay 12, an application program may launch.

Furthermore, as depicted, input devices 14 open through the enclosure28. As described above, the input devices 14 may enable a user tointeract with the handheld device 10A. For example, the input devices 14may enable the user to activate or deactivate the handheld device 10A,navigate a user interface to a home screen, navigate a user interface toa user-configurable application screen, activate a voice-recognitionfeature, provide volume control, and/or toggle between vibrate and ringmodes. As depicted, the I/O ports 16 also open through the enclosure 28.In some embodiments, the I/O ports 16 may include, for example, an audiojack to connect to external devices.

To help further illustrate, another example of a suitable electronicdevice 10, specifically a tablet device 10B, is shown in FIG. 3 . Merelyfor illustrative purposes, the tablet device 10B may be any iPad® modelavailable from Apple Inc. A further example of a suitable electronicdevice 10, specifically a computer 10C, is shown in FIG. 4 . Merely forillustrative purposes, the computer 10C may be any Macbook® or iMac®model available from Apple Inc. Another example of a suitable electronicdevice 10, specifically a watch 10D, is shown in FIG. 5 . Merely forillustrative purposes, the watch 10D may be any Apple Watch® modelavailable from Apple Inc. As depicted, the tablet device 10B, thecomputer 10C, and the watch 10D each also includes an electronic display12, one or more input devices 14, one or more I/O ports 16, and anenclosure 28. In other embodiments, an electronic device 10 may includeand/or utilize multiple electronic displays 12.

To help illustrate, another example of a suitable electronic device 10,specifically a (e.g., virtual-reality and/or mixed-reality) headset 10E,is shown in FIG. 6 . As depicted, the headset 10E includes a firstelectronic display 12A and a second electronic display 12B housed in anenclosure 28. When worn by a user (e.g., human) 34, the first electronicdisplay 12A may be used to display image content to a first (e.g.,right) eye of the user 34 and the second electronic display 12B may beused to display image content to a second (e.g., left) eye of the user34.

However, it should be appreciated that the depicted example is merelyintended to illustrative and not limiting. For example, in otherembodiments, a headset 10E may include a single electronic display 12implemented and/or operated to present image content to multiple (e.g.,both) eyes of a user 34. In any case, as described above, an electronicdisplay 12 may generally display image content by actively controllinglight emission from display pixels (e.g., color component sub-pixels)implemented on its display panel. In some embodiments, an electronicdisplay 12 may additionally include one or more lens disposed in front(e.g., over) its display panel, for example, to bend light emitted fromdisplay pixels on the display panel in a manner that facilitatespresenting virtual (e.g., virtual reality and/or augmented reality)image content to a user 34.

To help illustrate, an example of a portion 36 of an electronic display12, which includes a display panel 38 and a lens 40, relative to an eye42 of a user 34 is shown in FIG. 7 . As in the depicted example, thelens 40 may be a convex-concave (e.g., meniscus) lens. However, itshould be appreciated that the depicted example is merely intended to beillustrate and not limiting. For example, in other embodiments, the lens40 may be a biconvex lens, a biconcave lens, a plano-convex lens, or aplano-concave lens.

As depicted, the electronic display 12 includes multiple side (e.g.,off-axis) portions 48—namely a first side portion 48A and a second sideportion 48B—and a central (e.g., middle and/or on-axis) portion 48C.Additionally, as in the depicted example, the lens 40 may be curved in az-direction 50 relative to an axis in a y-direction 52 and, thus, thefirst side portion 48A may include a right portion of the display panel38 and the second side portion 48B may include a left portion of thedisplay panel 38. Additionally or alternatively, the lens 40 may becurved in the z-direction 50 relative to an axis in an x-direction 54and, thus, the first side portion 48A may include a top portion of thedisplay panel 38 and the second side portion 48B may include a bottomportion of the display panel 38.

As described above, to facilitate displaying image content, a displaypanel 38 may include multiple display pixels 56, which each include oneor more color component sub-pixels. For example, as depicted, a firstside (e.g., off-axis) display pixel 56A is implemented on the displaypanel 38 in the first side portion 48A of the electronic display 12, asecond side display pixel 56B is implemented on the display panel 38 inthe second side portion 48B of the electronic display 12, and a central(e.g., middle and/or on-axis) display pixel 56C is implemented on thedisplay panel 38 in the central portion 48C of the electronic display12. Furthermore, as depicted, each of the display pixels 56 emits light58 centered on its normal axis 60. In particular, the first side displaypixel 56A emits light 58A centered on a first normal axis 60A, thesecond side display pixel 56B emits light 58B centered on a secondnormal axis 60B, and the central display pixel 56C emits light 58Ccentered on a third normal axis 60C.

Moreover, as depicted, the lens 40 is disposed between a viewing surface57 of the display panel 38 and the user's eye 42. In other words, insome embodiments, the lens 40 may be implemented in front of and/or overthe viewing surface 57 of the display panel 38. Additionally, the lens40 may be implemented (e.g., formed) using one or morelight-transmissive materials, such as glass and/or plastic. Thus, as inthe depicted example, light 58 emitted from display pixels 56implemented on the display panel 38 may pass through the lens 40.

In fact, as in the depicted example, curvature of the lens 40 may bendthe light 58 passing therethrough, for example, to facilitate presentingvirtual (e.g., virtual reality and/or augmented reality) image contentto a user 34. In particular, due to the higher degree of curvatureoverlapping the first side display pixel 56A and the second side displaypixel 56B, the lens 40 may bend the first normal axis 60A of light 58Aemitted from the first side display pixel 56A and the second normal axis60B of light 58B emitted from the second side display pixel 56B towardthe eye 42 of the user 34. On the other hand, due to the lower degree ofcurvature overlapping the central display pixel 56C, the lens 40 mayproduce less bending in light 58C emitted from the central display pixel56C, for example, such that the third normal axis 60C of the light 58Cemitted from the central display pixel 56C remains relatively unchangedand, thus, oriented toward the eye 42 of the user 34.

Generally, a human's eye 42 perceives visible light due to interactionof corresponding light rays with cones (e.g., photoreceptor cells) inits retina. However, as described above, a human's eye 42 generally hasa limited field of view (FOV) 62. In other words, at least in someinstances, the limited field of view 62 may result in at least a portionof light 58 emitted from a display pixel 56 on a display panel 38 notactually reaching the cones of a human's eye 42 and, thus, not beingperceived by the human's eye 42.

For example, a first perceived portion 64A of light 58A emitted from thefirst side display pixel 56A may be in the field of view 62 of the eye42 and, thus, perceived by the eye 42 while a remaining portion of thelight 58A is not. Additionally, a second perceived portion 64B of light58B emitted from the second side display pixel 56B may be in the fieldof view 62 of the eye 42 and, thus, perceived by the eye 42 while aremaining portion of the light 58B is not. Furthermore, a thirdperceived portion 68C of light 58C emitted from the central displaypixel 56C may be in the field of view 62 of the eye 42 and, thus,perceived by the eye 42 while a remaining portion of the light 58C isnot.

Merely for illustrative purposes, as depicted, the third perceivedportion 64C of the light 58C emitted from the central display pixel 56Cis centered on the third normal axis 60C while the first perceivedportion 64A of the light 58A emitted from the first side display pixel56A is centered on a first (e.g., non-normal) axis 66A, which deviatesfrom the adjusted (e.g., bent) first normal axis 60A, and the secondperceived portion 64B of the light 58B emitted from the second sidedisplay pixel 56B is centered on a second (e.g., non-normal) axis 66B,which deviates from the adjusted (e.g., bent) second normal axis 60B ofthe light 58B. As described above, magnitude of light rays (e.g., light58) emitted from a display pixel 56 is generally strongest along itsnormal axis 60 and weakens as emission angle moves away from the normalaxis. In other words, when the first side display pixel 56A, the secondside display pixel 56B, and the central display pixel 56C each emitlight 58 of the same magnitude (e.g., strength), perceived luminanceresulting from the third perceived portion 64C of the light 58C emittedfrom the central display pixel 56C may be brighter than the perceivedluminance resulting from the first perceived portion 64A of the light58A emitted from the first side display pixel 56A and the perceivedluminance resulting from the second perceived portion 64B of the light58B emitted from the second side display pixel 56B.

However, at least in some instances, the field of view 62 of a user's(e.g., human's) eye 42 and, thus, the perceived portion of light 58emitted from a display pixel 56 may change with viewing characteristics,such as viewing (e.g., pupil or gave) angle, viewing location (e.g.,pupil relief), and/or viewing aperture (e.g., pupil or eye box) size.For example, viewing location may change due to a change in pupil relief(e.g., distance from electronic display 12) resulting from a translation(e.g., shift) of the eye 42 in the z-direction 50. Merely as anillustrative example, an increase in pupil relief may increase the firstperceived portion 64A of light 58A emitted from the first side displaypixel 56A that is included in the field of view 62, the second perceivedportion 64B of light 58B emitted from the second side display pixel 56Bthat is included in the field of view 62, and/or the third perceivedportion 64C of light 58C emitted from the central display pixel 56C thatis included in the field of view 62.

Additionally or alternatively, viewing location may change due to atranslation (e.g., shift) of the eye 42 in the x-direction 54 and/or they-direction 52. For example, translating the eye 42 in the x-direction54 toward the first side display pixel 56A and away from the second sidedisplay pixel 56B may increase the first perceived portion 64A of light58A emitted from the first side display pixel 56A that is included inthe field of view 62 while reducing the second perceived portion 64B oflight 58B emitted from the second side display pixel 56B that isincluded in the field of view 62. Conversely, translating the eye 42 inthe x-direction 54 toward the second side display pixel 56B and awayfrom the first side display pixel 56A may increase the second perceivedportion 64B of the light 58A emitted from the second side display pixel56B that is included in the field of view 62 while reducing the firstperceived portion 64A of the light 58A emitted from the first sidedisplay pixel 56A that is included in the field of view 62.

Furthermore, viewing characteristics may additionally or alternativelychange due to a change in viewing (e.g., pupil or gaze) angle resultingfrom rotation of the user's eye 42. In particular, rotation of theuser's eye 42 may result in its pupil 68 and, thus, resulting field ofview 62 rotating. For example, rotating the pupil 68 from the default(e.g., forward-facing) pupil position shown in FIG. 7 toward the firstside display pixel 56A may result in the field of view 62 rotatingtoward the first side display pixel 56A, which, at least in someinstances, may increase the first perceived portion 64A of light 58Aemitted from the first side display pixel 56A that is included in thefield of view 62 while reducing the second perceived portion 64B oflight 58B emitted from the second side display pixel 56B that isincluded in the field of view 62. Conversely, rotating the pupil 68 fromthe default pupil position shown in FIG. 7 toward the second sidedisplay pixel 56B may result in the field of view 62 rotating toward thesecond side display pixel 56B, which, at least in some instances, mayincrease the second perceived portion 64B of light 58B emitted from thesecond side display pixel 56B that is included in the field of view 62while reducing the first perceived portion 64A of light 58A emitted fromthe first side display pixel 56A that is included in the field of view62.

Moreover, viewing characteristics may additionally or alternativelychange due to a change in viewing aperture (e.g., pupil or eye box) sizeresulting from contraction or dilation of the pupil 68 of a user's eye42. In particular, contraction of the eye's pupil 68 may reduce theamount of visible light that reaches cones in the user's eye 42 and,thus, size (e.g., span) of the eye's field of view. Conversely, dilationof the eye's pupil may increase the amount of visible light that reachescones in the user's eye 42 and, thus, size of the eye's field of view.

To help further illustrate, examples of a perceived portion 64 of light58 emitted from a display pixel 56 on a display panel 38 under differentsets of viewing characteristics are shown in FIGS. 8A and 8B. Inparticular, FIG. 8A depicts the perceived portion 64C of light 58Cemitted a central display pixel 56C under a first set of viewingcharacteristics. On the other hand, FIG. 8B depicts the perceivedportion 64C of light emitted from the central display pixel 56C under asecond (e.g., different) set of viewing characteristics.

As depicted, the perceived portion 64C in FIG. 8A is larger than theperceived portion 64C in FIG. 8B. In other words, the first set ofviewing characteristics result in more of the light 58C emitted from thecentral display 56C being perceived by a user's (e.g., human's) eye 42and, thus, appearing brighter. On the other hand, the second set ofviewing characteristics result in less of the light 58C emitted from thecentral display 56C being perceived by the user's eye 42 and, thus,appearing darker.

As described above, the perceived portion 64 of light 58 emitted from adisplay pixel 56 may vary under different viewing characteristics, suchas different viewing (e.g., gaze or pupil) angles, different viewinglocations (e.g., pupil offset and/or pupil relief), and/or differentviewing aperture (e.g., pupil or eye box) size. For example, theperceived portion 64C of FIG. 8A may result due to the first set ofviewing characteristics including a viewing angle of zero whereas theperceived portion 64C of FIG. 8B may result due to the second set ofviewing characteristics including a non-zero viewing angle. Additionallyor alternatively, the perceived portion 64C of FIG. 8A may result due tothe first set of viewing characteristics including a larger viewingaperture size whereas the perceived portion 64C of FIG. 8B may resultdue to the second set of viewing characteristics including a smallerviewing aperture size.

Moreover, as described above, sensitivity to visible light generallyvaries across the retina of a human's eye 42. For example, a centralportion (e.g., fovea) of the retina may include more and/or denser cones(e.g., photoreceptor cells) and, thus, have a greater sensitivity tovisible light. On the other hand, an outer portion of the retina mayinclude fewer and/or less dense cones and, thus, have lower sensitivityto visible light.

To facilitate accounting for the variation in sensitivity to visiblelight, returning to FIG. 7 , the field of view 62 of the user's eye 42may be divided into a focus region 70 and one or more periphery regions72. In particular, the focus region 70 may correspond with the centralportion of the eye's retina (e.g., fovea). On the other hand, the one ormore periphery regions 72 may correspond with a peripheral (e.g., outer)portion of the eye's retina.

In other words, a change in viewing characteristics may change theperceived portion 64 of light 58 emitted from a display pixel 56 that isincluded in a field of view 62 of a user's eye 42 as well as whether theperceived portion 64 is in a focus region 70 of the field of view 62 ora periphery region 72 of the field of view 62. That is, at least in someinstances, light 58 emitted from display pixels 56 implemented on adisplay panel 38 may result in varying perceived luminances underdifferent viewing characteristics, such as different viewing angles,different viewing locations, and/or different viewing aperture sizes. Infact, at least in some instances, variations in perceived luminance mayresult in a perceivable visual artifact, such as a color shift,occurring in image content displayed on the display panel 38, forexample, due to display pixel 56 on the display panel 38 includingcomponent sub-pixels that each control light emission of a specificcolor and a human's eye 42 generally averaging light emission frommultiple color component sub-pixels to perceive different colors.

To help illustrate, an example of a portion of a display panel 38including multiple display pixels 56 is shown in FIG. 9 . As depicted,the display panel 38 includes a first side display pixel 56A, a secondside display pixel 56B, a central display pixel 56C, and an Nth displaypixel 56N, which directly neighbors the central display pixel 56C.Additionally, as depicted, each display pixel 56 includes multiple colorcomponent sub-pixels—namely a red sub-pixel 74, a green sub-pixel 76,and a blue sub-pixel 78.

In particular, as depicted, the first side display pixel 56A includes afirst side red sub-pixel 74A, a first side green sub-pixel 76A, and afirst side blue sub-pixel 78A while the second side display pixel 56Bincludes a second side red sub-pixel 74B, a second side green sub-pixel76B, and a second side blue sub-pixel 78B. Additionally, as depicted,the central display pixel 56C include a central red sub-pixel 74C, acentral green sub-pixel 76C, and a central blue sub-pixel 78C.Furthermore, as depicted, the Nth display pixel 56N includes an Nth redsub-pixel 74N, an Nth green sub-pixel 76N, and an Nth blue sub-pixel78N.

However, it should be appreciated that the depicted example is merelyintended to be illustrative and not limiting. For example, in otherembodiments, a display panel 38 may include a first set (e.g., half) ofdisplay pixels 56, which each include a red sub-pixel and a greensub-pixel, and a second set (e.g., half) of display pixels 56, whicheach includes a blue sub-pixel and a green sub-pixel. In someembodiments, one or more display pixel 56 implemented on a display panel38 may additionally or alternatively include a white sub-pixel. In anycase, to facilitate emitting light of a target color, in someembodiments, a color component sub-pixel on a display panel 38 mayinclude a color filter cell that matches the target color, for example,implemented between a light-emissive element (e.g., OLED) of the colorcomponent sub-pixel and a viewing surface 57 of the display panel 38.

To help illustrate, an example of a portion of a baseline display panel38A, which is viewed along the cross-sectional line 80 of FIG. 9 , isshown in FIG. 10 . As depicted, the baseline display panel 38A includesa color filter layer 82—namely a baseline color filter layer 82Aimplemented with a baseline color filter cell thickness—and alight-emissive element (e.g., OLED) layer 84. In particular, thebaseline color filter layer 82A includes a central red color filter cell86C of a central red sub-pixel 74C, a central green color filter cell88C of a central green sub-pixel 76C, an Nth red color filter cell 86Nof an Nth red sub-pixel 74N, and an Nth green color filter cell 88N ofan Nth green sub-pixel 76N. Additionally, the light-emissive elementlayer 84 includes a central red organic light-emitting diode (OLED) 90Cof the central red sub-pixel 74C, a central green organic light-emittingdiode 92C of the central green sub-pixel 76C, an Nth red organiclight-emitting diode 90N of the Nth red sub-pixel 74N, and an Nth greenorganic light-emitting diode 92N of the Nth green sub-pixel 76N.

Furthermore, as depicted, the baseline display panel 38A includes anencapsulation layer 94—namely a baseline encapsulation layer94A—implemented between the baseline color filter layer 82A and thelight-emissive element layer 84. In some embodiments, the encapsulationlayer 94 may be a thin film encapsulation (TFE) layer. Additionally, insome embodiments, the encapsulation layer 94 may be implemented usingone or more light-transmissive materials deposited over thelight-emissive element layer 84. For example, the baseline encapsulationlayer 94A may be deposited over the light-emissive element layer 84 witha baseline encapsulation thickness (e.g., height). Thus, as in thedepicted example, light rays 96 output (e.g., emitted) from thelight-emissive element layer 84 may pass through the baselineencapsulation layer 84A and the baseline color filter layer 82A beforeexiting a viewing surface 57 of the baseline display panel 38A.

Moreover, in the baseline display panel 38A, the footprint of each colorfilter cell may be centered on a corresponding light-emissive element(e.g., OLED). In other words, in the baseline display panel 38A, eachcolor filter cell in the baseline color filter layer 82A may have adefault color filter cell footprint (e.g., length, width, and/or pitch)that is centered on a normal axis of a corresponding light-emissiveelement. For example, the footprint of the Nth red color filter cell 86Nmay be centered on the normal axis of the Nth red organic light-emittingdiode 90N and, thus, a first light ray 96A emitted along the normal axismay pass through the baseline encapsulation layer 94A and the Nth redcolor filter cell 86N before exiting the viewing surface 57 of thebaseline display panel 38A.

Additionally, as depicted, a second light ray 96B and a third light ray96C, which are emitted from the Nth red organic light-emitting diode 90Nwith emission angles that deviate from the normal axis of the Nth redorganic light-emitting diode 90N, may also pass through the baselineencapsulation layer 94A and the Nth red color filter cell 86N beforeexiting the viewing surface 57 of the baseline display panel 38A.However, as depicted, a fourth light ray 96D emitted from the Nth redorganic light-emitting diode 90N with an emission angle that deviatesfrom the normal axis of the Nth red organic light-emitting diode 90N bymore than the emission angle of the second light ray 96B may actuallypass through the central green color filter cell 88C before exiting theviewing surface 57 of the baseline display panel 38A. Additionally, asdepicted, a fifth light ray 96E emitted from the Nth red organiclight-emitting diode 90N with an emission angle that deviates from thenormal axis of the Nth red organic light-emitting diode 90N by more thanthe emission angle of the third light ray 96C may actually pass throughthe Nth green color filter cell 88N before exiting the viewing surface57 of the baseline display panel 38A.

In other words, optical cross-talk may result in the baseline displaypanel 38A due to light emitted from a light-emissive element (e.g.,OLED) of a color component sub-pixel passing through a color filter cellof a neighboring (e.g., differently colored) color component sub-pixel.That is, although a portion of light emitted from a light-emissiveelement passes through a corresponding (e.g., appropriately colored)color filter cell, optical cross-talk may nevertheless result due toanother portion of the light emitted from the light-emissive elementpassing through a neighboring (e.g., inappropriately colored) colorfilter cell before exiting the viewing surface 57 of the baselinedisplay panel 38A. When light passing through a neighboring color filtercell is within the field of view 62 of a user's eye 42, the opticalcross-talk may result in a perceivable color shift in image contentdisplayed on the baseline display panel 38A.

Moreover, as described above, the field of view 62 of a user's eye 42generally varies with viewing characteristics, such as viewing angleand/or viewing location, used to view a display panel 38 and, thus,image content displayed on the display panel 38. In particular, asdescribed above, a change in the field of view 62 may change theperceived portion 64 of light 58 emitted from a display pixel 56. Forexample, a first field of view 62 may result in the first light ray 96A,which passes through the Nth red (e.g., appropriately colored) colorfilter cell 86N, being perceived by the user's eye 42. On the otherhand, a second (e.g., different) field of view 62 may result in thefifth light ray 96, which passes through the Nth green (e.g.,inappropriately colored) color filter cell 88N, being perceived by theuser's eye 42 and, thus, potentially increase perceivable color shiftresulting from optical cross-talk compared to the first field of view62. In other words, at least in some instances, perceivability of colorshift resulting from optical cross-talk may vary with viewingcharacteristics used to view image content displayed on a display panel38.

To help illustrate, an example plot 97A, which describes perceivabilityof color shift resulting across a (e.g., apparent and/or local) field ofview of a user's eye 42 when the baseline display panel 38A of FIG. 10is viewed using different sets of viewing characteristics, is shown inFIG. 11 . In particular, the plot 97A includes a first curve 98A, whichdescribes color shift perceivability resulting from a first set ofviewing characteristics that includes a viewing angle of zero degrees, asecond curve 100A, which describes color shift perceivability resultingfrom a second set of viewing characteristics that includes a viewingangle of fifteen degrees, and a third curve 102A, which describes colorshift perceivability resulting from a third set of viewingcharacteristics that includes a viewing angle of thirty degrees. Inother words, merely for illustrative purposes, the first set of viewingcharacteristics, the second set of viewing characteristics, and thethird set of viewing characteristics each include the same viewinglocation.

Nevertheless, as depicted, the different viewing angles result indifferent color shift profiles. For example, as described by the firstcurve 98A, minimal (e.g., no) color shift results in a focus region 70of the field of view 62 when the baseline display panel 38A is viewedwith a viewing angle of zero degrees (e.g., first set of viewingcharacteristics). However, as described by the first curve 98A, colorshift increases in periphery regions 72 of the field of view 62.

As described above, a focus region 70 in a field of view 62 generallycorresponds to a central portion of an eye's retina, which is moresensitive to visible light, while a periphery region 72 in the field ofview 62 generally corresponds to an outer portion of the eye's retina,which is less sensitive to visible light. In other words, perceivabilityof color shift occurring in the focus region 70 may be greater thancolor shift in a periphery region 72 and, thus, more color shift may beacceptable in the periphery region 72. However, as described by thesecond curve 100A, color shift resulting in the focus region 70 of thefield of view 62 increases when the baseline display panel 38A is viewedwith a viewing angle of fifteen degrees (e.g., second set of viewingcharacteristics). Moreover, as described by the third curve 102A, colorshift resulting in the focus region 70 of the field of view 62 mayfurther increase when the baseline display panel 38A is viewed with aviewing angle of thirty degrees (e.g., third set of viewingcharacteristics).

As described above, optical cross-talk may produce a perceivable colorshift in displayed image content due to light emitted from alight-emissive element (e.g., OLED) of a color component sub-pixel thatpasses through a neighboring (e.g., inappropriately colored) colorfilter cell actually being perceived by a user's eye 42. In other words,perceivability and/or likelihood of color shift occurring in displayedimage content may be reduced at least in part by reducing the amount oflight that passes through neighboring (e.g., inappropriately colored)color filter cells and is actually being perceived by the user's eye 42.In fact, in some embodiments, one or more panel implementationparameters used to implement (e.g., manufacture) a display panel 38 maybe adjusted to facilitate reducing perceivability and/or likelihood ofcolor shift occurring in displayed image content, for example, via adesign (e.g., manufacturing) process.

To help illustrate, an example of a process 104 for designing (e.g.,manufacturing, calibrating, and/or tuning) a display panel 38 isdescribed in FIG. 12 . Generally, the design process 104 includesdetermining color shift expected to result from current panelimplementation parameters under various sets of viewing parameters(process block 106) and determining whether the expected color shift isless than a color shift threshold (decision block 108). Additionally,the design process 104 includes maintaining the current panelimplementation parameters when the expected color shift is less than thecolor shift threshold (process block 110) and adjusting the currentpanel implementation parameters when the expected color shift is notless than the color shift threshold (process block 112).

Although described in a particular order, which represents a particularembodiment, it should be noted that the design process 104 may beperformed in any suitable order. Additionally, embodiments of the designprocess 104 may omit process blocks and/or include additional processblocks. Moreover, in some embodiments, the design process 104 may beperformed at least in part by a design system (e.g., one or moredevices). In other words, at least in some such embodiments, the designprocess 104 may be implemented at least in part by executinginstructions stored in a tangible, non-transitory, computer-readablemedium, such as design memory implemented in the design system, usingprocessing circuitry, such as a design processor implemented in thedesign system.

To help illustrate, an example of a design (e.g., manufacturing and/orcalibration) system 113, which may operate to facilitate designing(e.g., determining and/or adjusting) panel implementation parameters ofa display panel 38, is shown in FIG. 13 . As in the depicted example,the design system 113 may include one or more image sensors 114, such asone or more cameras, one or more design (e.g., computing) devices 115,and one or more actuators 116, such as one or more electrical motors.However, it should be appreciated that the depicted example is merelyintended to be illustrative and not limiting. In particular, in otherembodiments, a design system 113 may not include an actuator 116, forexample, when the viewing characteristics of an image sensor 114 ismanually adjusted.

As will be described in more detail below, the one or more designdevices 115 may design one or more panel implementation parameters 117based at least in part on captured image data 118 output from an imagesensor 114. To facilitate designing panel implementation parameters 117,as in the depicted example, a design device 115 may include one or moredesign processors 119 and calibration memory 120. In particular, in someembodiments, the design memory 120 may be included in a tangible,non-transitory, computer-readable medium implemented and/or operated tostore instructions, data, or both. Additionally, in some embodiments,the design processor 119 may include processing circuitry that executesinstructions and/or processes data stored in the design memory 120.

For example, the design memory 120 may store one or more current (e.g.,baseline) panel implementation parameters 117 and/or one or moreadjusted panel implementation parameters 117. Additionally, as in thedepicted example, the design memory 120 may store one or more colorshift thresholds 121, which may be used to determine whether to adjust acurrent panel implementation parameter 117. Furthermore, in someembodiments, the design processor 119 may output one or more controlsignals 123, for example, to instruct an actuator 116 to adjust one ormore viewing characteristics of an image sensor 114 and/or to instructthe image sensor 114 to capture a picture.

In some embodiments, an image sensor 114, such as a camera, may capturea picture by generating captured image data 118 that indicates visualcharacteristics, such as color and/or achromatic brightness (e.g.,grayscale) level, of light 58 sensed (e.g., measured) at one or morepixel positions on the display panel 38. For example, the captured imagedata 118 corresponding with a pixel position may include captured redcomponent image data 118 that indicates brightness level of red lightsensed at the pixel position, captured blue component image data 118that indicates brightness level of blue light sensed at the pixelposition, captured green component image data 118 that indicatesbrightness level of green light sensed at the pixel position, capturedwhite component image data 118 that indicates brightness level of whitelight sensed at the pixel position, or any combination thereof. In otherwords, captured image data 118 corresponding with a picture of imagecontent being displayed on a display panel 38 may be indicative ofluminance that would actually be perceived by a user's eye 42 and, thus,used to determine one or more color shift metrics 122 indicative ofcolor shift that would actually be perceived by the user's eye 42.

As such, returning to the design process 104 of FIG. 12 , in someembodiments, a design system 113 may determine color shift expected toresult in image content displayed on a display panel 38, which isimplemented using current panel implementation parameters, under varioussets of viewing characteristics based at least in part on correspondingcaptured image data 118, for example, received from an image sensor 114(process block 106). In particular, in some embodiments, the designsystem 113 may determine a color shift metric 122 indicative of colorshift expected to occur at a pixel position on the display panel 38under a set of viewing characteristics based at least in part ondeviation of a sensed brightness level indicated in captured image data118, which is captured using the set of viewing characteristics, from acorresponding target brightness level. For example, the design system113 may determine a color shift metric 122 associated with a pixelposition based at least in part on deviation of sensed red lightbrightness level indicated in captured red component image data 118 froma target red light brightness level corresponding with the pixelposition, deviation of sensed green light brightness level indicated incaptured green component image data 118 from a target green lightbrightness level corresponding with the pixel position, deviation ofsensed blue light brightness level indicated in captured blue componentimage data 118 from a target blue light brightness level correspondingwith the pixel position, deviation of sensed white light brightnesslevel indicated in captured white component image data 118 from a targetwhite light brightness level corresponding with the pixel position, orany combination thereof.

Additionally, for each set of viewing characteristics, in someembodiments, the design system 113 may determine a color shift profilethat includes color shift metrics 122 corresponding with multiple pixelpositions on the display panel 38, for example, similar to the plot 97Aof FIG. 11 . Furthermore, as described above, a set of viewingcharacteristics may include a viewing (e.g., pupil or gaze) angle, aviewing location (e.g., pupil offset or pupil relief), a view aperture(e.g., pupil or eye box) size. Thus, in some embodiments, the designsystem 113 may determine color shift expected to result when the displaypanel 38 is viewed with various different viewing angles (process block124). Additionally or alternatively, the design system 113 may determinecolor shift expected to result when the display panel 38 is viewed fromvarious different viewing locations (process block 125). Furthermore,the design system 113 may determine color shift expected to result whenthe display panel 38 is viewed using various aperture sizes (processblock 126).

To facilitate determining color shift metrics 122 resulting fromdifferent sets of viewing characteristics, as described above, in someembodiments, a design device 115 in the design system 113 may output oneor more control signals 123 that instruct an actuator 116 to adjust oneor more viewing characteristics of the image sensor 114. For example,the design device 115 may instruct the actuator 116 to translate theimage sensor 114 in a z-direction 50, an x-direction 54, and/or ay-direction 52 to adjust viewing location of the image sensor 114.Additionally or alternatively, the design device 115 may instruct theactuator 116 to rotate the image sensor 114 in the x-direction 54 and/orthe y-direction 52 to adjust viewing angle of the image sensor 114.Furthermore, the design device 115 may additionally or alternativelyinstruct the actuator 116 to adjust shutter size and/or shutter speed toadjust aperture size of the image sensor 114. In other embodiments, oneor more viewing characteristics of the image sensor 114 may be manuallyadjusted.

The design system 113 may then determine whether the expected colorshift is less than a color shift threshold 121 (process block 108). Insome embodiments, the color shift threshold may be predetermined andstored in a tangible, non-transitory, computer-readable medium of thedesign system 113. Thus, in such embodiments, the design system 113 maydetermine the color shift threshold 121 at least in part by retrievingthe color shift threshold from the tangible, non-transitory,computer-readable medium.

In fact, in some embodiments, the design system 113 may evaluate theexpected color shift using multiple different color shift thresholds121. For example, the design system 113 may evaluate color shiftexpected to result in a focus region 70 of the field of view 62 using afirst (e.g., lower) color shift threshold. On the other hand, the designsystem 113 may evaluate color shift expected to result in a peripheryregion 72 of the field of view 62 using a second (e.g., higher) colorshift threshold. In other words, utilizing multiple different colorshift thresholds may enable the design system 113 to vary acceptablecolor shift in different regions of the field of view 62, for example,in coordination with variation in light sensitivity across the retina ofa user's eye 42.

When the expected color shift is less than the color shift threshold,the design system 113 may maintain the current panel implementationparameters (process block 110). In some embodiments, the panelimplementation parameters may govern size (e.g., thickness) of a colorfilter layer 82, size (e.g., thickness) of an encapsulation layer 94disposed between the color filter layer 82 and a light-emissive element(e.g., OLED) layer 84, and/or size (e.g., thickness and/or footprint) ofone or more color filter cells included in the color filter layer 82. Asdescribed above, light rays 96 emitted from the light-emissive elementlayer 84 may pass through the encapsulation layer 94 and the colorfilter layer 82 before exiting a (e.g., forward-facing) viewing surface57 of a display panel 38. Additionally, as described above, perceivablecolor shift may occur due to light rays 96 emitted from a light-emissiveelement (e.g., OLED) of a color component sub-pixel that pass through aneighboring (e.g., inappropriately colored) color filter cell actuallybeing perceived by a user's eye 42.

Thus, when the expected color shift is not less than (e.g., greater thanor equal to) the color shift threshold, the design system 113 may adjustone or more of the current panel implementation parameters to facilitatereducing perceivability and/or likelihood of color shift resulting indisplayed image content (process block 112). In particular, in someembodiments, the design system 113 may adjust one or more of the currentpanel implementation parameters to adjust (e.g., reduce) the distancebetween a light emitting element (e.g., OLED) of a color componentsub-pixel and an outward-facing surface of the color filter layer 82(process block 127). For example, to facilitate reducing the distancebetween the organic light-emitting diode (OLED) of the color componentsub-pixel and the outward-facing surface of the color filter layer 82,the design system 113 adjust one or more of the current (e.g., baseline)implementation parameters to reduce thickness (e.g., height) of one ormore color filter cells in the color filter layer 82 (e.g., from abaseline color filter cell thickness) (process block 128).

To help illustrate, an example of a reduced color filter cell thicknessdisplay panel 38B, which is viewed along the cross-sectional line 80 ofFIG. 9 , is shown in FIG. 14 . As in the baseline display panel 38A ofFIG. 10 , the reduced color filter cell thickness display panel 38B ofFIG. 14 includes a color filter layer 82, an encapsulation layer 94, anda light-emissive element (e.g., OLED) layer 84. Merely for illustrativepurposes, the light-emissive element layer 84 of the reduced colorfilter cell thickness display panel 38B matches the light-emissiveelement layer 84 of the baseline display panel 38A.

Additionally, merely for illustrative purposes, the encapsulation layer94 of FIG. 14 matches the baseline encapsulation layer 94A of FIG. 10 .In other words, merely for illustrative purposes, the encapsulationlayer 94 of the reduced color filter cell thickness display panel 38B isimplemented with the baseline encapsulation thickness. However, theadjusted color filter layer 82B of FIG. 14 is thinner than the baselinecolor filter layer 82A of FIG. 10 . In other words, thickness of theadjusted color filter layer 82B may be reduced from the baseline colorfilter cell thickness, thereby reducing the distance light rays 96travel before exiting an outward-facing surface of the adjusted colorfilter layer 82C.

As in the depicted example, the reduced travel distance resulting fromthe reduced thickness of the adjusted color filter layer 82C mayfacilitate reducing the distance that light rays 96 emitted from alight-emissive element (e.g., OLED) of a color component sub-pixeltravel through a neighboring (e.g., inappropriately colored) colorfilter cell. For example, the reduced thickness of the adjusted colorfilter layer 82C may facilitate reducing the distance that the fourthlight ray 96D emitted from the Nth red organic light-emitting diode(OLED) 90N travels through the central green color filter cell 88Ccompared to the baseline display panel 38A of FIG. 10 and, thus, mayfacilitate reducing optical cross-talk and potentially resulting colorshift. Additionally, the reduced thickness of the adjusted color filterlayer 82C may facilitate reducing the distance that the fifth light ray96E emitted from the Nth red organic light-emitting diode (OLED) 90Ntravels through the Nth green color filter cell 88N compared to thebaseline display panel 38A of FIG. 10 and, thus, may facilitate reducingoptical cross-talk and potentially resulting color shift. In thismanner, one or more current (e.g., baseline) panel implementationparameters to be used to implement a display panel 38 may be adjusted toadjust (e.g., reduce) thickness of its color filter layer 82, which, atleast in some instances, may facilitate improving perceived imagequality provided by the display panel 38, for example, by reducingoptical cross-talk between different color component sub-pixels on thedisplay panel 38 and, thus, resulting color shift in displayed imagecontent.

However, it should be appreciated that the depicted examples are merelyintended to be illustrative and not limiting. For example, in otherembodiments, thickness of one or more color filter cells may be adjusteddifferent amounts. Merely as an illustrative example, the Nth red colorfilter cell 86N may be implemented with a baseline color filter cellthickness whereas the central green color filter cell 88C and/or the Nthgreen color filter cell 88N are implemented with an adjusted (e.g.,reduced) color filter cell thickness. Moreover, returning to the designprocess 104 of FIG. 12 , to adjust (e.g., reduce) the distance betweenthe light emitting element (e.g., OLED) of the color component sub-pixeland the outward-facing surface of the color filter layer 82, the designsystem 113 may additionally or alternatively adjust one or more of thecurrent (e.g., baseline) implementation parameters to reduce thickness(e.g., height) of an encapsulation layer 94 (e.g., from a baselineencapsulation thickness) (process block 129).

To help illustrate, an example of a reduced encapsulation thicknessdisplay panel 38C, which is viewed along the cross-sectional line 80 ofFIG. 9 , is shown in FIG. 15 . As in the baseline display panel 38A ofFIG. 10 , the reduced encapsulation thickness display panel 38C of FIG.15 includes a color filter layer 82, an encapsulation layer 94, and alight-emissive element (e.g., OLED) layer 84. Merely for illustrativepurposes, the light-emissive element layer 84 of the reducedencapsulation thickness display panel 38C matches the light-emissiveelement layer 84 of the baseline display panel 38A.

Additionally, merely for illustrative purposes, the color filter layer82 of FIG. 15 matches the baseline encapsulation layer 94A of FIG. 10 .In other words, merely for illustrative purposes, the color filter layer82C of the reduced encapsulation thickness display panel 38C isimplemented with the baseline color filter cell thickness. However, theadjusted encapsulation layer 94C of FIG. 15 is thinner than the baselineencapsulation layer 94A of FIG. 10 . In other words, thickness of theadjusted encapsulation layer 94C may be reduced from the baselineencapsulation thickness, thereby reducing the distance light rays 96travel before exiting an outward-facing surface of the color filterlayer 82C.

As in the depicted example, the reduced travel distance resulting fromthe reduced thickness of the adjusted encapsulation layer 94C mayfacilitate reducing the distance that light rays 96 emitted from alight-emissive element (e.g., OLED) of a color component sub-pixeltravel through a neighboring (e.g., inappropriately colored) colorfilter cell. For example, the reduced thickness of the adjustedencapsulation layer 94C may facilitate reducing the distance that thefourth light ray 96D emitted from the Nth red organic light-emittingdiode (OLED) 90N travels through the central green color filter cell 88Ccompared to the baseline display panel 38A of FIG. 10 and, thus, mayfacilitate reducing optical cross-talk and potentially resulting colorshift. Additionally, the reduced thickness of the adjusted encapsulationlayer 94C may facilitate reducing the distance that the fifth light ray96E emitted from the Nth red organic light-emitting diode (OLED) 90Ntravels through the Nth green color filter cell 88N compared to thebaseline display panel 38A of FIG. 10 and, thus, may facilitate reducingoptical cross-talk and potentially resulting color shift.

However, it should be appreciated that the depicted example is aremerely intended to be illustrative and not limiting. In fact, in otherembodiments, one or more current (e.g., baseline) panel implementationparameters may be adjusted to adjust color filter cell thickness as wellas encapsulation thickness. For example, to facilitate further reducingoptical cross-talk and potentially resulting color shift, in someembodiments, a display panel 38 may be implemented with reduced colorfilter cell thickness as well as reduced encapsulation thickness.

To help illustrate, another example of a reduced thickness display panel38D, which is viewed along the cross-sectional line 80 of FIG. 9 , isshown in FIG. 16 . As in the baseline display panel 38A of FIG. 10 , thereduced thickness display panel 38D of FIG. 16 includes a color filterlayer 82, an encapsulation layer 94, and a light-emissive element (e.g.,OLED) layer 84. Merely for illustrative purposes, the light-emissiveelement layer 84 of the reduced thickness display panel 38D matches thelight-emissive element layer 84 of the baseline display panel 38A.

However, the adjusted color filter layer 82D of FIG. 16 differs from thebaseline color filter layer 82A of FIG. 10 and the adjustedencapsulation layer 94D of FIG. 16 differs from the baselineencapsulation layer 94A of FIG. 10 . In particular, similar to theadjusted color filter layer 82B of FIG. 14 , the adjusted color filterlayer 82D of FIG. 16 is thinner than the baseline color filter layer 82Aof FIG. 10 . In other words, thickness of the adjusted color filterlayer 82D may be reduced from the baseline color filter cell thickness,thereby reducing the distance light rays 96 travel before exiting anoutward-facing surface of the adjusted color filter layer 82D.Additionally, similar to the adjusted encapsulation layer 94C of FIG. 15, the adjusted encapsulation layer 94D of FIG. 16 is thinner than thebaseline encapsulation layer 94A of FIG. 10 . In other words, thicknessof the adjusted encapsulation layer 94D may be reduced from the baselineencapsulation thickness, thereby further reducing the distance lightrays 96 travel before exiting the outward-facing surface of the adjustedcolor filter layer 82D.

As in the depicted example, the further reduced travel distanceresulting from the reduced thickness of the adjusted color filter layer82D and the reduced thickness of the adjusted encapsulation layer 94Dmay facilitate further reducing the distance that light rays 96 emittedfrom a light-emissive element (e.g., OLED) of a color componentsub-pixel travel through a neighboring (e.g., inappropriately colored)color filter cell. In fact, merely as an illustrative example, thereduced thickness of the adjusted color filter layer 82D and the reducedthickness of the adjusted encapsulation layer 94D may result in thefourth light ray 96D emitted from the Nth red organic light-emittingdiode (OLED) 90N exiting the adjusted color filter layer 82D withoutpassing through the central green color filter cell 88C and/or the fifthlight ray 96E emitted from the Nth red organic light-emitting diode(OLED) 90N exiting the adjusted color filter layer 82D without passingthrough the Nth green color filter cell 88N. In this manner, one or morepanel implementation parameters may be adjusted to facilitate reducingoptical cross-talk between different color component sub-pixels on adisplay panel 38 and, thus, resulting color shift in image contentdisplayed on the display panel 38.

To help further illustrate, an example plot 97D, which describesperceivability of color shift resulting across a (e.g., apparent and/orlocal) field of view of a user's eye 42 when the reduced thicknessdisplay panel 38D of FIG. 16 is viewed using different sets of viewingcharacteristics, is shown in FIG. 17 . In particular, the plot 97Dincludes a first curve 98D, which describes color shift perceivabilityresulting from a first set of viewing characteristics that includes aviewing angle of zero degrees, a second curve 100D, which describescolor shift perceivability resulting from a second set of viewingcharacteristics that includes a viewing angle of fifteen degrees, and athird curve 102D, which describes color shift perceivability resultingfrom a third set of viewing characteristics that includes a viewingangle of thirty degrees. In other words, merely for illustrativepurposes, the first set of viewing characteristics described in the plot97D of FIG. 17 matches the first set of viewing characteristicsdescribed in the plot 97A of FIG. 11 , the second set of viewingcharacteristics described in the plot 97D of FIG. 17 matches the secondset of viewing characteristics described in the plot 97A of FIG. 11 ,and the third set of viewing characteristics described in the plot 97Dof FIG. 17 matches the third set of viewing characteristics described inthe plot 97A of FIG. 11 .

As depicted, the different viewing angles may result in different colorshift profiles. For example, similar to the first curve 98A of FIG. 11 ,as described by the first curve 98D of FIG. 17 , minimal (e.g., no)color shift results in a focus region 70 of the field of view 62 and anincrease in color shift occurs in in periphery regions 72 of the fieldof view 62 when the reduced thickness display panel 38D is viewed with aviewing angle of zero degrees (e.g., first set of viewingcharacteristics). In fact, as described by the first curve 98D of FIG.17 , the reduced thickness display panel 38D may facilitate reducingcolor shift resulting in the periphery regions 72 of the field of view62 compared to the baseline display panel 38A.

Nevertheless, similar to the second curve 100A of FIG. 11 , as describedby the second curve 100D of FIG. 17 , color shift resulting in the focusregion 70 of the field of view 62 increases when the reduced thicknessdisplay panel 38D is viewed with a viewing angle of fifteen degrees(e.g., second set of viewing characteristics). Additionally, similar tothe third curve 102A of FIG. 11 , as described by the third curve 102Dof FIG. 17 , color shift resulting in the focus region 70 of the fieldof view 62 further increases when the reduced thickness display panel38D is viewed with a viewing angle of thirty degrees (e.g., third set ofviewing characteristics). However, as described by the second curve 100Dand the third curve 102D of FIG. 17 , the reduced thickness displaypanel 38D may facilitate reducing color shift resulting in the field ofview 62 compared to the baseline display panel 38A. In this manner,adjusting one or more baseline (e.g., current) panel implementationparameters to reduce the distance between light emitting elements (e.g.,OLEDs) of color component sub-pixels and an outward-facing surface of acolor filter layer 82 may facilitate improving perceived image qualityprovided by a display panel 38, for example, due to the reduced distancereducing optical cross-talk between different color component sub-pixelsand, thus, resulting color shift in displayed image content.

Returning to the design process 104 of FIG. 12 , in addition to colorfilter cell thickness (e.g., height) and/or encapsulation thickness, asdescribed above, panel implementation parameters may govern footprint(e.g., width, length, and/or pitch) of one or more color filter cells inthe color filter layer 82. Thus, to facilitate reducing color shiftresulting from optical cross-talk, the design system 113 mayadditionally or alternatively adjust one or more current (e.g.,baseline) panel implementation parameters to adjust footprint (e.g.,width, length, and/or pitch) of one or more color filter cells in thecolor filter layer 82 (process block 131). For example, the designsystem 113 may increase footprint of each color filter cell in the colorfilter layer 82 by a uniform amount (e.g., from a baseline color filtercell footprint) (process block 133).

To help illustrate, an example of a uniform color filter cell (CF)footprint display panel 38E, which is viewed along the cross-sectionalline 80 of FIG. 9 , is shown in FIG. 18 . As in the baseline displaypanel 38A of FIG. 10 , the uniform color filter cell footprint displaypanel 38E of FIG. 18 includes a color filter layer 82, an encapsulationlayer 94, and a light-emissive element (e.g., OLED) layer 84. Merely forillustrative purposes, the light-emissive element layer 84 of theuniform color filter cell footprint display panel 38E matches thelight-emissive element layer 84 of the baseline display panel 38A.

Additionally, merely for illustrative purposes, the encapsulation layer94 of FIG. 18 matches the baseline encapsulation layer 94A of FIG. 10 .In other words, merely for illustrative purposes, the encapsulationlayer 94 of the uniform color filter cell footprint display panel 38E isimplemented with the baseline encapsulation thickness. Furthermore,merely for illustrative purposes, thickness of the adjusted color filterlayer 82E of FIG. 18 matches thickness of the baseline color filterlayer 82A of FIG. 10 . In other words, merely for illustrative purposes,the adjusted color filter layer 82E of the uniform color filter cellfootprint display panel 38E is implemented with the baseline colorfilter cell thickness.

However, the footprint (e.g., width, height, and/or pitch) of each colorfilter cell in the adjusted color filter layer 82E of FIG. 18 uniformlydiffers for the footprint of corresponding color filter cells in thebaseline color filter layer 82A of FIG. 10 . In other words, in someembodiments, the footprint (e.g., width, height, and/or pitch) of eachcolor filter cell in the adjusted color filter layer 82E of the uniformcolor filter cell footprint display panel 38E may be uniformly increasedfrom the baseline color filter cell footprint. Moreover, as in thedepicted example, in some embodiments, the adjusted color filter layer82E may nevertheless be centered over the light-emissive element layer84, for example, such that the adjusted color filter layer 82E isrelative to a central display pixel 56C on the uniform color filter cellfootprint display panel 38E. In other words, in such embodiments,increasing color filter cell footprint may result in color filter cellsbeing shifted outward.

In fact, in some embodiments, the outward shift produced by a uniformcolor footprint increase may result in the adjusted color filter layer82E of the uniform color filter cell footprint display panel 38Eoverhanging one or more edges (e.g., sides) its light-emissive element(e.g., OLED) layer 84 and/or its encapsulation layer 94. Moreover, as inthe depicted example, the uniformly increased color filter cellfootprint of the adjusted color filter layer 82E may affect the distancethat light rays 96 emitted from a light-emissive element (e.g., OLED) ofa color component sub-pixel travel through a neighboring (e.g.,inappropriately colored) color filter cell. For example, the uniformlyincreased color filter cell footprint of the adjusted color filter layer82E may reduce the distance the fifth light ray 96E emitted from the Nthred organic light-emitting diode (OLED) 90N travels through the Nthgreen color filter cell 88N before exiting the adjusted color filterlayer 82E of the uniform color filter cell footprint display panel 38E.In this manner, one or more panel implementation parameters may beadjusted to facilitate reducing optical cross-talk between differentcolor component sub-pixels on a display panel 38 and, thus, resultingcolor shift in image content displayed on the display panel 38.

To help further illustrate, an example plot 97E, which describesperceivability of color shift resulting across a (e.g., apparent and/orlocal) field of view of a user's eye 42 when the uniform color filtercell footprint display panel 38E of FIG. 18 is viewed using differentsets of viewing characteristics, is shown in FIG. 17 . In particular,the plot 97E includes a first curve 98E, which describes color shiftperceivability resulting from a first set of viewing characteristicsthat includes a viewing angle of zero degrees, a second curve 100E,which describes color shift perceivability resulting from a second setof viewing characteristics that includes a viewing angle of fifteendegrees, and a third curve 102E, which describes color shiftperceivability resulting from a third set of viewing characteristicsthat includes a viewing angle of thirty degrees. In other words, merelyfor illustrative purposes, the first set of viewing characteristicsdescribed in the plot 97E of FIG. 19 matches the first set of viewingcharacteristics described in the plot 97A of FIG. 11 , the second set ofviewing characteristics described in the plot 97E of FIG. 19 matches thesecond set of viewing characteristics described in the plot 97A of FIG.11 , and the third set of viewing characteristics described in the plot97E of FIG. 19 matches the third set of viewing characteristicsdescribed in the plot 97A of FIG. 11 .

As depicted, the different viewing angles may result in different colorshift profiles. For example, similar to the first curve 98A of FIG. 11 ,as described by the first curve 98E of FIG. 19 , minimal (e.g., no)color shift results in a focus region 70 of the field of view 62 and anincrease in color shift occurs in periphery regions 72 of the field ofview 62 when the uniform color filter cell footprint display panel 38Eis viewed with a viewing angle of zero degrees (e.g., first set ofviewing characteristics). In fact, similar to the first curve 98D ofFIG. 17 , as described by the first curve 98E of FIG. 19 , the uniformcolor filter cell footprint display panel 38E may facilitate reducingcolor shift resulting in the periphery regions 72 of the field of view62 compared to the baseline display panel 38A.

Nevertheless, similar to the second curve 100A of FIG. 11 , as describedby the second curve 100E of FIG. 19 , color shift resulting in the focusregion 70 of the field of view 62 increases when the uniform colorfilter cell footprint display panel 38E is viewed with a viewing angleof fifteen degrees (e.g., second set of viewing characteristics).Additionally, similar to the third curve 102A of FIG. 11 , as describedby the third curve 102E of FIG. 19 , color shift resulting in the focusregion 70 of the field of view 62 further increases when the uniformcolor filter cell footprint display panel 38E is viewed with a viewingangle of thirty degrees (e.g., third set of viewing characteristics).However, as described by the second curve 100E and the third curve 102Eof FIG. 19 , the uniform color filter cell footprint display panel 38Emay facilitate reducing color shift resulting in the field of view 62compared to the baseline display panel 38A. In this manner, adjustingone or more baseline (e.g., current) panel implementation parameters touniformly increase color filter cell footprint may facilitate improvingperceived image quality provided by a display panel 38, for example, atleast in a focus region 70 of the field of view 62 of a user's eye 42.

However, as described by the second curve 100E of FIG. 19 , adjustingone or more baseline (e.g., current) panel implementation parameters touniformly increase color filter cell footprint may produce a color shiftspike 130 (e.g., non-monotonic change) in a periphery region 72 of thefield of view 62 when the uniform color filter cell footprint displaypanel 38E is viewed with a viewing angle of fifteen degrees (e.g.,second set of viewing characteristics). Moreover, as described by thethird curve 102E of FIG. 19 , adjusting one or more baseline (e.g.,current) panel implementation parameters to uniformly increase colorfilter cell footprint may produce an even larger color shift spike 130in the periphery region 72 of the field of view 62 when the uniformcolor filter cell footprint display panel 38E is viewed with a viewingangle of thirty degrees (e.g., third set of viewing characteristics). Inother words, at least in some instances, the uniform color filter cellfootprint display panel 38E may result in a color shift spike 130 in aperiphery region 72 of the field of view (FOV) 62 when viewed with anon-zero viewing angle. For example, with regard to FIG. 18 , a colorshift spike 130 in a periphery region 72 of the field of view 62 mayresult due to the uniform color filter cell footprint display panel 38Eincreasing the distance the fourth light ray 96D emitted from the Nthred organic light-emitting diode (OLED) 90N travels through the centralgreen color filter cell 88C before exiting the adjusted color filterlayer 82E.

As described above, a focus region 70 in a field of view 62 generallycorresponds to a central portion of an eye's retina, which is moresensitive to visible light, while a periphery region 72 in the field offield 62 generally corresponds to an outer portion of the eye's retina,which is less sensitive to visible light. In other words, perceivabilityof color shift occurring in the focus region 70 may be greater thancolor shift in a periphery region 72 and, thus, more color shift may beacceptable in the periphery region 72. Nevertheless, a color shift spike130, even in the periphery region 72 of the field of view 62, maygenerally be more perceivable than a monotonically changing color shift.To facilitate reducing perceivability of color shift resulting in aperiphery region 72, returning to the design process 104 of FIG. 12 ,the design system 113 may additionally or alternatively adjust colorfilter cell footprint (e.g., width, length, and/or pitch) in the colorfilter layer 82 by increasing footprint of one or more color filtercells by non-uniform (e.g., different) amounts, for example, from abaseline color filter cell footprint (process block 135).

To help illustrate, an example of a non-uniform color filter cell (CF)footprint display panel 38F, which is viewed along the cross-sectionalline 80 of FIG. 9 , is shown in FIG. 20 . As in the baseline displaypanel 38A of FIG. 10 , the non-uniform color filter cell footprintdisplay panel 38F of FIG. 20 includes a color filter layer 82, anencapsulation layer 94, and a light-emissive element (e.g., OLED) layer84. Merely for illustrative purposes, the light-emissive element layer84 of the non-uniform color filter cell footprint display panel 38Fmatches the light-emissive element layer 84 of the baseline displaypanel 38A.

Additionally, merely for illustrative purposes, the encapsulation layer94 of FIG. 20 matches the baseline encapsulation layer 94A of FIG. 10 .In other words, merely for illustrative purposes, the encapsulationlayer 94 of the non-uniform color filter cell footprint display panel38F is implemented with the baseline encapsulation thickness.Furthermore, merely for illustrative purposes, thickness of the adjustedcolor filter layer 82F of FIG. 20 matches thickness of the baselinecolor filter layer 82A of FIG. 10 . In other words, merely forillustrative purposes, the adjusted color filter layer 82F of thenon-uniform color filter cell footprint display panel 38F is implementedwith the baseline color filter cell thickness.

However, the footprint (e.g., width, height, and/or pitch) of differentcolor filter cells in the adjusted color filter layer 82F of FIG. 20differ from one another. For example, the footprint of the central greencolor filter cell 88C may match the baseline color filter cellfootprint. However, the footprint of the Nth red color filter cell 86Nand/or the Nth green color filter cell 88N may be increased from thebaseline color filter cell footprint by a first amount. Additionally,the footprint of a second side red color filter cell 86B correspondingwith a second side red sub-pixel 74B and/or the footprint of a secondside green color filter cell 88B corresponding with a second side greensub-pixel 76B may be increased from the baseline color filter cellfootprint by a second amount.

In fact, in some embodiments, the footprint of color filter cells in theadjusted color filter layer 82F of the non-uniform color filter cellfootprint display panel 38F may gradually increase moving away from itscentral display pixel 56C. In other words, in such embodiments, thesecond amount with which footprint of the second side red color filtercell 86B and/or the footprint of the second side green color filter cell88B is increased from the baseline color filter cell footprint may begreater than the first amount with which footprint of the Nth red colorfilter cell 86N and/or the footprint of the Nth green color filter cell88N is increased from the baseline color filter cell footprint.Moreover, similar to the uniform color filter cell footprint displaypanel 38E of FIG. 18 , in some embodiments, the adjusted color filterlayer 82F of FIG. 20 may nevertheless being centered over thelight-emissive element layer 84, for example, such that the adjustedcolor filter layer 82F is centered over a central display pixel 56C onthe non-uniform color filter cell footprint display panel 38F. In otherwords, in such embodiments, increasing color filter cell footprint mayresult in color filter cells being shifted outward.

In fact, in some embodiments, the outward shift produced by anon-uniform color footprint increase may result in the adjusted colorfilter layer 82F of the non-uniform color filter cell footprint displaypanel 38F overhanging one or more edges (e.g., sides) of itslight-emissive element (e.g., OLED) layer 84 and/or its encapsulationlayer 94. Moreover, as in the depicted example, the non-uniformlyincreased color filter cell footprint of the adjusted color filter layer82F may affect the distance that light rays 96 emitted from alight-emissive element (e.g., OLED) of a color component sub-pixeltravel through a neighboring (e.g., inappropriately colored) colorfilter cell. For example, compared to the uniform color filter cellfootprint display panel 38E of FIG. 18 , the non-uniformly increasedcolor filter cell footprint of the non-uniform color filter cellfootprint display panel 38F of FIG. 20 may reduce the distance thefourth light ray 96D emitted from the Nth red organic light-emittingdiode (OLED) 90N travels through central green color filter cell 88Cbefore exiting the adjusted color filter layer 82F, which, at least insome instances, may facilitate reducing likelihood of a color shiftspike 130 occurring in a periphery region 72 of the field of view 62 ofa user's eye 42.

To help further illustrate, an example plot 97F, which describesperceivability of color shift resulting across a (e.g., apparent and/orlocal) field of view of a user's eye 42 when the non-uniform colorfilter cell footprint display panel 38F of FIG. 20 is viewed usingdifferent sets of viewing characteristics, is shown in FIG. 21 . Inparticular, the plot 97F includes a first curve 98F, which describescolor shift perceivability resulting from a first set of viewingcharacteristics that includes a viewing angle of zero degrees, a secondcurve 100F, which describes color shift perceivability resulting from asecond set of viewing characteristics that includes a viewing angle offifteen degrees, and a third curve 102F, which describes color shiftperceivability resulting from a third set of viewing characteristicsthat includes a viewing angle of thirty degrees. In other words, merelyfor illustrative purposes, the first set of viewing characteristicsdescribed in the plot 97F of FIG. 21 matches the first set of viewingcharacteristics described in the plot 97A of FIG. 11 , the second set ofviewing characteristics described in the plot 97F of FIG. 21 matches thesecond set of viewing characteristics described in the plot 97A of FIG.11 , and the third set of viewing characteristics described in the plot97F of FIG. 21 matches the third set of viewing characteristicsdescribed in the plot 97A of FIG. 11 .

As depicted, the different viewing angles may result in different colorshift profiles. For example, similar to the first curve 98A of FIG. 11 ,as described by the first curve 98F of FIG. 21 , minimal (e.g., no)color shift results in a focus region 70 of the field of view 62 and anincrease in color shift occurs in in periphery regions 72 of the fieldof view 62 when the non-uniform color filter cell footprint displaypanel 38F is viewed with a viewing angle of zero degrees (e.g., firstset of viewing characteristics). In fact, similar to the first curve 98Dof FIG. 17 and the first curve 98E of FIG. 19 , as described by thefirst curve 98F of FIG. 21 , the non-uniform color filter cell footprintdisplay panel 38F may facilitate reducing color shift resulting in theperiphery regions 72 of the field of view 62 compared to the baselinedisplay panel 38A.

Nevertheless, similar to the second curve 100A of FIG. 11 , as describedby the second curve 100F of FIG. 21 , color shift resulting in the focusregion 70 of the field of view 62 increases when the uniform colorfilter cell footprint display panel 38E is viewed with a viewing angleof fifteen degrees (e.g., second set of viewing characteristics).Additionally, similar to the third curve 102A of FIG. 11 , as describedby the third curve 102F of FIG. 21 , color shift resulting in the focusregion 70 of the field of view 62 further increases when the uniformcolor filter cell footprint display panel 38E is viewed with a viewingangle of thirty degrees (e.g., third set of viewing characteristics).However, as described by the second curve 100F and the third curve 102Fof FIG. 21 , the non-uniform color filter cell footprint display panel38F may facilitate reducing color shift resulting in the field of view62 compared to the baseline display panel 38A. Moreover, as described bythe second curve 100F and the third curve 102F of FIG. 21 , thenon-uniform color filter cell footprint display panel 38F may facilitatereducing color shift spikes 130 resulting a periphery region 72 of thefield of view 62 compared to uniform color filter cell footprint displaypanel 38E. In this manner, adjusting one or more baseline (e.g.,current) panel implementation parameters to non-uniformly increase colorfilter cell footprint may facilitate improving perceived image qualityprovided by a display panel 38 in a focus region 70 and/or a peripheryregion 72 of the field of view 62 of a user's eye 42.

However, it should be appreciated that the depicted example is merelyintended to be illustrative and not limiting. In particular, in otherembodiments, magnitude and/or likelihood of color shift spikes 130occurring in a periphery region 72 of the field of view 62 may bereduced by adjusting one or more current (e.g., baseline) panelimplementation parameters in a different manner. For example, tofacilitate reducing magnitude and/or likelihood of color shift spikes130 occurring in a periphery region 72, in some embodiments, a displaypanel 38 implemented with uniformly increased color filter cellfootprints may additionally be implemented with a reduced color filtercell thickness and/or a reduced encapsulation thickness.

To help illustrate, an example of a reduced thickness and uniform colorfilter cell (CF) footprint display panel 38G, which is viewed along thecross-sectional line 80 of FIG. 9 , is shown in FIG. 22 . As in thebaseline display panel 38A of FIG. 10 , the reduced thickness anduniform color filter cell footprint display panel 38G of FIG. 22includes a color filter layer 82, an encapsulation layer 94, and alight-emissive element (e.g., OLED) layer 84. Merely for illustrativepurposes, the light-emissive element layer 84 of the reduced thicknessand uniform color filter cell footprint display panel 38G matches thelight-emissive element layer 84 of the baseline display panel 38A.

However, the adjusted encapsulation layer 94G of FIG. 22 differs fromthe baseline encapsulation layer 94A of FIG. 10 . In particular, theadjusted encapsulation layer 94G of the reduced thickness and uniformcolor filter cell footprint display panel 38G is thinner than thebaseline encapsulation layer 94A of the baseline display panel 38A. Forexample, thickness of the adjusted encapsulation layer 94G of FIG. 22may match thickness of the adjusted encapsulation layer 94C of FIG. 15and, thus, differ from the baseline encapsulation thickness. In otherwords, thickness of the adjusted encapsulation layer 94G of the reducedthickness and uniform color filter cell footprint display panel 38G maybe reduced from the baseline encapsulation thickness, thereby reducingthe distance light rays 96 travel before exiting an outward-facingsurface of the adjusted color filter layer 82G.

Moreover, the adjusted color filter layer 82G of FIG. 22 differs fromthe baseline color filter layer 82A of FIG. 10 . In particular, theadjusted color filter layer 82G of the reduced thickness and uniformcolor filter cell footprint display panel 38G is thinner than thebaseline color filter layer 82A of the baseline display panel 38A. Forexample, thickness of the adjusted color filter layer 82G of FIG. 22 maymatch thickness of the adjusted color filter layer 82B of FIG. 14 and,thus, differ from the baseline color filter cell thickness. In otherwords, thickness of the adjusted color filter layer 82G of the reducedthickness and uniform color filter cell footprint display panel 38G maybe reduced from the baseline color filter cell thickness, therebyreducing the distance light rays 96 travel before exiting anoutward-facing surface of the adjusted color filter layer 82G.

In addition to thickness, color filter cell footprint in the adjustedcolor filter layer 82G of the reduced thickness and uniform color filtercell footprint display panel 38G differs from color filter cellfootprint in the baseline color filter layer 82A of the baseline displaypanel 38A. For example, color filter cell footprint in the adjustedcolor filter layer 82G of FIG. 22 may match color filter cell footprintin the adjusted color filter layer 82E of FIG. 18 . In other words,footprint of color filter cells in the adjusted color filter layer 82Gof the reduced thickness and uniform color filter cell footprint displaypanel 38G may be uniformly increased from the baseline color filter cellfootprint.

As described above, at least in some instances, uniformly increasingcolor filter cell footprint may result in a color shift spike 130occurring in a periphery region 72 of the field of view 62 of a user'seye 42. For example, with regard to the uniform color filter cellfootprint display panel 38E of FIG. 18 , a color shift spike 130 mayoccur in the periphery region 72 due to the uniformly increased colorfilter cell footprint increasing the distance the fourth light ray 96Demitted from the Nth red organic light-emitting diode (OLED) 90N travelsthrough the central green color filter cell 88C. However, as depicted inthe reduced thickness and uniform color filter cell footprint displaypanel 38G of FIG. 22 , the reduced color filter cell thickness and thereduced encapsulation thickness may facilitate reducing the distance thefourth light ray 96D emitted from the Nth red organic light-emittingdiode (OLED) 90N travels through the central green color filter cell88C, which, at least in some instances, may facilitate reducingmagnitude and/or likelihood of color shift spikes 130 and, thus,improving perceived quality of displayed image content.

To help further illustrate, an example plot 97G, which describesperceivability of color shift resulting across a (e.g., apparent and/orlocal) field of view of a user's eye 42 when the reduced thickness anduniform color filter cell footprint display panel 38G of FIG. 22 isviewed using different sets of viewing characteristics, is shown in FIG.23 . In particular, the plot 97G includes a first curve 98G, whichdescribes color shift perceivability resulting from a first set ofviewing characteristics that includes a viewing angle of zero degrees, asecond curve 100G, which describes color shift perceivability resultingfrom a second set of viewing characteristics that includes a viewingangle of fifteen degrees, and a third curve 102G, which describes colorshift perceivability resulting from a third set of viewingcharacteristics that includes a viewing angle of thirty degrees. Inother words, merely for illustrative purposes, the first set of viewingcharacteristics described in the plot 97G of FIG. 23 matches the firstset of viewing characteristics described in the plot 97A of FIG. 11 ,the second set of viewing characteristics described in the plot 97G ofFIG. 23 matches the second set of viewing characteristics described inthe plot 97A of FIG. 11 , and the third set of viewing characteristicsdescribed in the plot 97G of FIG. 23 matches the third set of viewingcharacteristics described in the plot 97A of FIG. 11 .

As depicted, the different viewing angles may result in different colorshift profiles. For example, similar to the first curve 98A of FIG. 11 ,as described by the first curve 98G of FIG. 23 , minimal (e.g., no)color shift results in a focus region 70 of the field of view 62 and anincrease in color shift occurs in in periphery regions 72 of the fieldof view 62 when the reduced thickness and uniform color filter cellfootprint display panel 38G is viewed with a viewing angle of zerodegrees (e.g., first set of viewing characteristics). In fact, similarto the first curve 98D of FIG. 17 and the first curve 98E of FIG. 19 ,as described by the first curve 98G of FIG. 23 , the reduced thicknessand uniform color filter cell footprint display panel 38G may facilitatereducing color shift resulting in the periphery regions 72 of the fieldof view 62 compared to the baseline display panel 38A.

Nevertheless, similar to the second curve 100A of FIG. 11 , as describedby the second curve 100G of FIG. 23 , color shift resulting in the focusregion 70 of the field of view 62 increases when the reduced thicknessand uniform color filter cell footprint display panel 38G is viewed witha viewing angle of fifteen degrees (e.g., second set of viewingcharacteristics). Additionally, similar to the third curve 102A of FIG.11 , as described by the third curve 102G of FIG. 23 , color shiftresulting in the focus region 70 of the field of view 62 furtherincreases when the reduced thickness and uniform color filter cellfootprint display panel 38G is viewed with a viewing angle of thirtydegrees (e.g., third set of viewing characteristics). However, asdescribed by the second curve 100G and the third curve 102G of FIG. 22 ,the reduced thickness and uniform color filter cell footprint displaypanel 38G may facilitate reducing color shift resulting in the field ofview 62 compared to the baseline display panel 38A. Moreover, asdescribed by the second curve 100G and the third curve 102G of FIG. 23 ,the reduced thickness and uniform color filter cell footprint displaypanel 38G may facilitate reducing color shift spikes 130 resulting in aperiphery region of the field of view 62 compared to the uniform colorfilter cell footprint display panel 38E.

In this manner, adjusting one or more baseline (e.g., current) panelimplementation parameters to adjust (e.g., reduce) color filter cellthickness, to adjust (e.g., reduce) encapsulation thickness, and touniformly adjust (e.g., increase) color filter cell footprint mayfacilitate reducing perceivability of color shift resulting from opticalcross-talk and, thus, improving perceived image quality provided by adisplay panel 38. However, at least in some instances, even when panelimplementation parameters are adjusted in this manner, some amount ofcolor shift resulting from optical cross-talk may nevertheless beperceivable in image content displayed on a display panel 38. Asdescribed above, an electronic display 12 may display image content onits display panel 38 by actively controlling light emission from displaypixels 56 on the display panel 38 based on corresponding image data, forexample, which is indicative of target characteristics (e.g., colorand/or magnitude) of light emission therefrom. Thus, to facilitateimproving perceived image quality provided by the electronic display 12,in some embodiments, an electronic device 10 may process image data tocompensate for expected optical cross-talk and, thus, resulting colorshift before processed (e.g., display) image data is supplied to theelectronic display 12 to display corresponding image content, forexample, via image processing circuitry 27.

To help illustrate, an example of a portion 137 of an electronic device10, which includes image processing circuitry 27, is shown in FIG. 24 .As in the depicted example, the image processing circuitry 27 may becommunicatively coupled between an image source 132 and an electronicdisplay 12. Additionally, as in the depicted example, the imageprocessing circuitry 27 and/or the image source 132 may becommunicatively coupled to one or more eye tracking sensors (e.g.,cameras) 134.

As will be described in more detail below, in some embodiments, an eyetracking sensor 134 may output viewing characteristic parametersindicative of viewing characteristics with which a user's eye 42 isviewing or is expected to view a display panel 38 of the electronicdisplay 12. For example, the viewing characteristic parameters mayindicate a horizontal (e.g., x-direction 54) offset of the eye's pupil68 from a default (e.g., forward facing) pupil position and a vertical(e.g., y-direction 52) offset of the eye's pupil 68 from the defaultpupil position and, thus, may be indicative of expected viewing angle.Additionally or alternatively, the viewing characteristic parameters mayindicate a pupil relief (e.g., distance from pupil 68 to display panel38) and, thus, may be indicative of expected viewing location.Furthermore, as in the depicted example, the image processing circuitry27 may be communicatively coupled to one or more controllers (e.g.,control circuitry) 136. However, it should be appreciated that thedepicted example is merely intended to illustrative and not limiting.

In some embodiments, a controller 136 may generally control operation ofthe image source 132, the image processing circuitry 27, the electronicdisplay 12, the one or more eye tracking sensors 134 or any combinationthereof. Although depicted as a single controller 136, in otherembodiments, one or more separate controllers 136 may be used to controloperation of the image source 132, the image processing circuitry 27,the electronic display 12, the one or more eye tracking sensors 134, orany combination thereof. To facilitate controlling operation, as in thedepicted example, the controller 136 may include one or more controllerprocessors (e.g., processing circuitry) 138 and controller memory 140.

In some embodiments, a controller processor 138 may be included in theprocessor core complex 18 and/or separate processing circuitry and thecontroller memory 140 may be included in main memory 20, a storagedevice 22, and/or a separate, tangible, non-transitory computer-readablemedium. Additionally, in some embodiments, a controller processor 138may execute instructions and/or process data stored in the controllermemory 140 to control operation of the image source 132, the imageprocessing circuitry 27, the electronic display 12, and/or the one ormore eye tracking sensors 134. In other embodiments, the controllerprocessor 138 may be hardwired with instructions that, when executed,control operation of the image processing circuitry 27, the electronicdisplay 12, the one or more eye tracking sensors 134, and/or the imagesource 132.

Generally, the image source 132 may be implemented and/or operated togenerate source (e.g., input or original) image data 142 correspondingwith image content to be displayed on the display panel 38 of theelectronic display 12. Thus, in some embodiments, the image source 132may be included in the processor core complex 18, a graphics processingunit (GPU), an image sensor (e.g., camera), and/or the like.Additionally, in some embodiments, the source image data 142 may bestored in the electronic device 10 before supply to the image processingcircuitry 27, for example, in main memory 20, a storage device 22,and/or a separate, tangible, non-transitory computer-readable medium. Infact, as well be described in more detail below, to facilitateconserving (e.g., optimizing) storage capacity of the electronic device10, in some embodiments, the source image data 142 may be stored and/orsupplied to the image processing circuitry 27 in a foveated (e.g.,compressed or grouped) domain, which utilizes a pixel resolutiondifferent from (e.g., lower than) a panel (e.g., native or non-foveated)domain of the display panel 38.

As described above, a display panel 38 of an electronic display 12 mayinclude one or more display pixels 56, which each include one or morecolor component sub-pixels. For example, each display pixel 56implemented on the display panel 38 may include a red sub-pixel 74, ablue sub-pixel 78, and a green sub-pixel 76. As another example, thedisplay panel 38 may include a first set (e.g., half) of display pixels56, which each include a red sub-pixel 74 and a green sub-pixel 76, anda second set (e.g., half) of display pixels 56, which each includes ablue sub-pixel 78 and a green sub-pixel 76. In some embodiments, one ormore display pixel 56 on the display panel 38 may additionally oralternatively include a white sub-pixel.

As described above, an electronic display 12 may display image contenton its display panel 38 by appropriately controlling light emission fromdisplay pixels (e.g., color component sub-pixels) 56 implementedthereon. Generally, light emission from a display pixel (e.g., colorcomponent sub-pixel) 56 may vary with the magnitude of electrical energystored therein. For example, in some instances, a display pixel 56 mayinclude a light-emissive element, such as an organic light-emittingdiode (OLED), that varies its light emission with current flowtherethrough, a current control switching device (e.g., transistor)coupled between the light-emissive element and a pixel power (e.g.,V_(DD)) supply rail, and a storage capacitor coupled to a control (e.g.,gate) terminal of the current control switching device. As such, varyingthe amount of energy stored in the storage capacitor may vary voltageapplied to the control terminal of the current control switching deviceand, thus, magnitude of electrical current supplied from the pixel powersupply rail to the light-emissive element of the display pixel 56.

However, it should be appreciated that discussion with regard to OLEDexamples are merely intended to be illustrative and not limiting. Inother words, the techniques described in the present disclosure may beapplied to and/or adapted for other types of electronic displays 12,such as a liquid crystal display (LCD) 12 and/or a micro light-emittingdiode (LED) electronic displays 12. In any case, since light emissionfrom a display pixel 56 generally varies with electrical energy storagetherein, to display an image, an electronic display 12 may write adisplay pixel 56 at least in part by supplying an analog electrical(e.g., voltage and/or current) signal to the display pixel 56, forexample, to charge and/or discharge a storage capacitor in the displaypixel 56.

To facilitate selectively writing its display pixels 56, as in thedepicted example, the electronic display 12 may include driver circuitry141, which includes a scan driver 144 and a data driver 146. Inparticular, the electronic display 12 may be implemented such that eachof its display pixels 56 is coupled to the scan driver 144 via acorresponding scan line and to the data driver 146 via a correspondingdata line. Thus, to write a row of display pixels 56, the scan driver144 may output an activation (e.g., logic high) control signal to acorresponding scan line that causes each display pixel 56 coupled to thescan line to electrically couple its storage capacitor to acorresponding data line. Additionally, the data driver 146 may output ananalog electrical signal to each data line coupled to an activateddisplay pixel 56 to control the amount of electrical energy stored inthe display pixel 56 and, thus, resulting light emission (e.g.,perceived luminance and/or perceived brightness).

As described above, image data corresponding with image content beindicative of target visual characteristics (e.g., luminance and/orcolor) at one or more specific points (e.g., image pixels) in the imagecontent, for example, by indicating color component brightness (e.g.,grayscale) levels that are scaled by a panel brightness setting. Inother words, the image data may correspond with a pixel position on adisplay panel and, thus, indicate target luminance of at least a displaypixel 56 implemented at the pixel position. For example, the image datamay include red component image data indicative of target luminance of ared sub-pixel 74 in the display pixel 56, blue component image dataindicative of target luminance of a blue sub-pixel 78 in the displaypixel 56, green component image data indicative of target luminance of agreen sub-pixel 76 in the display pixel 56, white component image dataindicative of target luminance of a white sub-pixel in the display pixel56, or any combination thereof. As such, to display image content, theelectronic display 12 may control supply (e.g., magnitude and/orduration) of analog electrical signals from its data driver 146 to itsdisplay pixels 56 based at least in part on corresponding image data.

However, to facilitate improving perceived image quality, imageprocessing circuitry 27 may be implemented and/or operated to process(e.g., adjust) image data before the image data is used to display acorresponding image on the electronic display 12. Thus, in someembodiments, the image processing circuitry 27 may be included in theprocessor core complex 18, a display pipeline (e.g., chip or integratedcircuit device), a timing controller (TCON) in the electronic display12, or any combination thereof. Additionally or alternatively, the imageprocessing circuitry 27 may be implemented as a system-on-chip (SoC).

As in the depicted example, the image processing circuitry 27 may beimplemented and/or operated to process the source image data 142 outputfrom the image source 132. In some embodiments, the image processingcircuitry 27 may directly receive the source image data 142 from theimage source 132. Additionally or alternatively, the source image data142 output from the image source 132 may be stored in a tangible,non-transitory, computer-readable medium, such as main memory 20, and,thus, the image processing circuitry 27 may receive (e.g., retrieve) thesource image data 142 from the tangible, non-transitory,computer-readable medium, for example, via a direct memory access (DMA)technique.

The image processing circuitry 27 may then process the source image data142 to generate display (e.g., processed or output) image data 147, forexample, which adjusts target luminances to compensate for expectedoptical cross-talk and, thus, resulting color shift. As described above,to facilitate conserving (e.g., optimizing) storage capacity of theelectronic device 10, in some embodiments, the source image data 142received by the image processing circuitry 27 may be indicated in afoveated (e.g., compressed or grouped) domain, which utilizes a pixelresolution different from (e.g., lower than) a panel (e.g., native ornon-foveated) domain of the display panel 38. In particular, in thefoveated domain, an image frame may be divided in multiple foveationregions (e.g., tiles) in which different pixel resolutions are utilized.

To help illustrate, an example of an image frame 148 divided intomultiple foveation regions is shown in FIG. 25 . As depicted, a centralfoveation region 150 is identified in the image frame 148. Additionally,as depicted, multiple outer foveation regions 152 outside of the centralfoveation region 150 are identified in the image frame 148.

In some embodiments, the central foveation region 150 and one or moreouter foveation regions 152 may be identified based at least in part ona field of view (FOV) 62 with which a display panel 38 to be used todisplay the image frame 148 is expected to be viewed and, thus, based atleast in part on viewing characteristics (e.g., viewing angle and/orviewing location) with which the display panel 38 is expected to beviewed, for example, indicated by one or more viewing characteristicparameters received from an eye tracking sensor 134. In particular, insuch embodiments, the central foveation region 150 may be identified inthe image frame 148 such that the central foveation region 150 isco-located with a focus region 70 of the field of view 62 while an outerfoveation region 152 is identified in the image frame 148 such that theouter foveation region 152 is co-located with a periphery region of thefield of view 62. In other words, the depicted example may be identifiedwhen the focus region 70 of the field of view 62 is expected to becentered on a central portion 48C of the display panel 38.

However, at least in such embodiments, a change in viewingcharacteristics may change the field of view 62 and, thus,characteristics (e.g., size, location, and/or pixel resolution) offoveation regions identified in an image frame 148. In other words, itshould be appreciated that the depicted example is merely intended to beillustrative and not limiting. For example, a change in viewing anglethat moves the focus region 70 toward a first side portion 48A of thedisplay panel 38 may result in the central foveation region 150 beingshifted toward the right and/or top of the image frame 148 while achange in viewing angle that moves the focus region 70 toward a secondside portion 48B of the display panel 38 may result in the centralfoveation region 150 being shifted toward the left and/or bottom of theimage frame 148. Additionally or alternatively, a change in viewinglocation that increases size of the focus region 70 may result in sizeof central foveation region 150 being expanded (e.g., increased), whilea change in viewing location that decreases size of the focus region 70may result in size of central foveation region 150 being contracted(e.g., decreased or reduced).

As described above, a user's eye 42 is generally more sensitive tovisible light in the focus region 70 of its field of view 62. As such,to facilitate improving perceived image quality, in some embodiments,the pixel resolution used in the central foveation region 150 maymaximize pixel resolution implemented on the display panel 38. In otherwords, in some embodiments, the central foveation region 150 may utilizea pixel resolution that matches the (e.g., full) pixel resolution of thedisplay panel 38. That is, in such embodiments, each image pixel (e.g.,image data corresponding with point in image) in the central foveationregion 150 of the image frame 148 may correspond with single displaypixel (e.g., set of one or more color component sub-pixels) 56implemented on the display panel 38. For example, red component imagedata of the image pixel in the central foveation region 150 maycorresponding with one or more red sub-pixels 74 in the display pixel56, green component image data of the image pixel in the centralfoveation region 150 may correspond with one or more green sub-pixels 76in the display pixel 56, and blue component image data of the imagepixel in the central foveation region 150 may correspond with one ormore blue sub-pixels 78 in the display pixel 56. Additionally oralternatively, white component image data of the image pixel in thecentral foveation region 150 may corresponding with one or more whitesub-pixels in the display pixel 56.

On the other hand, as described above, a user's eye 42 is generally lesssensitive to visible light in a periphery region 72 outside the focusregion 70 of its field of view 62. Leveraging the reduced sensitivity,in some embodiments, each outer foveation region 152 in the image frame148 may utilize a pixel resolution lower than the pixel resolution ofthe central foveation region 150 and, thus, the (e.g., full) pixelresolution of the display panel 38. In other words, in such embodiments,each image pixel (e.g., image data corresponding with point in image) inan outer foveation region 152 of the image frame 148 may correspond withmultiple display pixels (e.g., sets of one or more color componentsub-pixels) 56 implemented on the display panel 38.

In fact, sensitivity to visible light of a user's eye 42 may varyoutside the focus region 70 of its field of view 62. For example, theuser's eye 42 may be more sensitive to visible light in a firstperiphery region 72 closer to the focus region 70 of its field of view62. On the other hand, the user's eye 42 may be less sensitive tovisible light in a second periphery region 72 farther from the focusregion 70 of its field of view 62.

To facilitate accounting for variation in sensitivity to visible lightoutside the focus region 70, in some embodiments, different outerfoveation regions 152 identified in the image frame 148 may utilizedifferent pixel resolutions. In particular, in such embodiments, anouter foveation region 152 closer to the central foveation region 150may utilize a higher pixel resolution. On the other hand, in suchembodiments, an outer foveation region 152 farther from the centralfoveation region 150 may utilize a lower pixel resolution.

Merely as an illustrative example, a first set of outer foveationregions 152 may include each outer foveation region 152 directlyadjacent and outside the central foveation region 150. In other words,with regard to the depicted example, the first set of outer foveationregions 152 may include a first outer foveation region 152A, a secondouter foveation region 152B, a third outer foveation region 152C, and afourth outer foveation region 152D. Due to proximity to the centralfoveation region 150, in some embodiments, each outer foveation region152 in the first set of outer foveation regions 152 may utilize a pixelresolution that is half the pixel resolution of the central foveationregion 150 and, thus, the (e.g., full) pixel resolution of the displaypanel 38. In other words, in such embodiments, each image pixel (e.g.,image data corresponding with point in image) in the first set of outerfoveation regions 152 may correspond with two display pixels (e.g., setsof one or more color component sub-pixels) 56 implemented on the displaypanel 38.

Additionally, merely as an illustrative example, a second set of outerfoveation regions 152 may include each outer foveation region 152directly adjacent and outside the first set of outer foveation regions152. In other words, with regard to the depicted example, the second setof outer foveation regions 152 may include a fifth outer foveationregion 152E, a sixth outer foveation region 152F, a seventh outerfoveation region 152G, an eighth outer foveation region 152H, a ninthouter foveation region 152I, a tenth outer foveation region 152I, aneleventh outer foveation region 152K, and a twelfth outer foveationregion 152L. Due to being located outside of the first set of outerfoveation regions 152, in some embodiments, each outer foveation region152 in the second set of outer foveation regions 152 may utilize a pixelresolution that is half the pixel resolution of the first set of outerfoveation regions 152 and, thus, a quarter of the pixel resolution ofthe central foveation region 150 and the display panel 38. In otherwords, in such embodiments, each image pixel (e.g., image datacorresponding with point in image) in the second set of outer foveationregions 152 may correspond with four display pixels (e.g., sets of oneor more color component sub-pixels) 56 implemented on the display panel38.

Furthermore, merely as an illustrative example, a third set of outerfoveation regions 152 may include each outer foveation region 152directly adjacent and outside the second set of outer foveation regions152. In other words, with regard to the depicted example, the third setof outer foveation regions 152 may include a thirteenth outer foveationregion 152M, a fourteenth outer foveation region 152N, a fifteenth outerfoveation region 152O, a sixteenth outer foveation region 152P, aseventeenth outer foveation region 152Q, an eighteenth outer foveationregion 152R, a nineteenth outer foveation region 152S, and a twentiethouter foveation region 152T. Due to being located outside of the secondset of outer foveation regions 152, in some embodiments, each outerfoveation region 152 in the third set of outer foveation regions 152 mayutilize a pixel resolution that is half the second set of outerfoveation regions 152 and, thus, an eighth of the pixel resolution ofthe central foveation region 150 and the display panel 38. In otherwords, in such embodiments, each image pixel (e.g., image datacorresponding with point in image) in the third set of outer foveationregions 152 may correspond with eight display pixels (e.g., sets of oneor more color component sub-pixels) 56 implemented on the display panel38.

Moreover, merely as an illustrative example, a fourth set of outerfoveation regions 152 may include each outer foveation region 152directly adjacent and outside the third set of outer foveation regions152. In other words, with regard to the depicted example, the second setof outer foveation regions 152 may include a twenty-first outerfoveation region 152U, a twenty-second outer foveation region 152V, atwenty-third outer foveation region 152W, and a twenty-fourth outerfoveation region 152X. Due to being located outside of the third set ofouter foveation regions 152, in some embodiments, each outer foveationregion 152 in the fourth set of outer foveation regions 152 may utilizea pixel resolution that is half the pixel resolution of the third set ofouter foveation regions 152 and, thus, a sixteenth of the pixelresolution of the central foveation region 150 and the display panel 38.In other words, in such embodiments, each image pixel (e.g., image datacorresponding with point in image) in the fourth set of outer foveationregions 152 may correspond with sixteen display pixels (e.g., sets ofone or more color component sub-pixels) 56 implemented on the displaypanel 38.

Returning to the image processing circuitry 27 of FIG. 24 , as describedabove, the image processing circuitry 27 may process source image data142 to determine display image data 147, which may then be supplied tothe electronic display 12 to display corresponding image content. As inthe depicted example, in some embodiments, the image processingcircuitry 27 may be organized into one or more image processing blocks(e.g., circuitry groups). For example, the image processing circuitry 27may include an optical cross-talk compensation (OXTC) block 154, whichis implemented and/or operated to process image data to facilitatecompensating for perceivable color shift resulting from opticalcross-talk between different colored sub-pixels on the display panel 38.As in the depicted example, to facilitate compensating for resultingcolor shift, the optical cross-talk compensation block 154 may includeand/or utilize one or more optical cross-talk compensation (OXTC) factormaps 156.

An example of optical cross-talk compensation factor map 156A, which maybe used by image processing circuitry 27 in an electronic device 10, isshown in FIG. 26 . As depicted, the optical cross-talk compensationfactor map 156A may explicitly identify one or more pixel positions 158on a display panel 38. In particular, the optical cross-talkcompensation factor map 156A may explicitly associate each identifiedpixel position 158 with one or more optical cross-talk compensation(OXTC) factors to be applied to image data corresponding with a displaypixel 56 at the pixel position 158.

In fact, to facilitate compensating for optical cross-talk betweenneighboring color component sub-pixels on the display panel 38, in someembodiments, an optical cross-talk compensation factor map 156 mayexplicitly associate a pixel position 158 with a set of multiple opticalcross-talk compensation factors. For example, the optical cross-talkcompensation factors associated with a pixel position 158 may beindicated by a three-by-three matrix as follows:

$\begin{bmatrix}F_{R} & F_{R2G} & F_{R2B} \\F_{G2R} & F_{G} & F_{G2B} \\F_{B2R} & F_{B2G} & F_{B}\end{bmatrix}\quad$in which F_(R) is a red optical cross-talk compensation factor, F_(R2G)is a red-to-green optical cross-talk compensation factor, F_(R2B) is ared-to-blue optical cross-talk compensation factor, F_(G2R) is agreen-to-red optical cross-talk compensation factor, F_(G) a greenoptical cross-talk compensation factor, F_(G2B) a green-to-blue opticalcross-talk compensation factor, F_(B2R) is a blue-to-red opticalcross-talk compensation factor, F_(B2G) is a blue-to-green opticalcross-talk compensation factor, and F_(B) a blue optical cross-talkcompensation factor. In such embodiments, when input image dataassociated with the pixel position is received, the optical cross-talkcompensation block 154 may apply each of the multiple optical cross-talkcompensation factors to the input image data, for example, bymultiplying the three-by-three matrix with a three-by-one matrix (e.g.,vector) including red component input image data, green component inputimage data, and blue component input image data.

Thus, in some embodiments, an optical cross-talk compensation factor mayinclude a gain value, which when applied to image data, scales a targetcolor component grayscale level indicated in the image data.Additionally or alternatively, an optical cross-talk compensation factormay include an offset value, which when applied to image data, biases atarget color component grayscale level indicated in the image data.Furthermore, in some embodiments, an optical cross-talk compensationfactor map 156 to be used by image processing circuitry 27 in anelectronic device 10 may be stored in the electronic device 10, forexample, in main memory 20, a storage device 22, internal memory of theimage processing circuitry 27, and/or another tangible, non-transitory,computer-readable medium.

Thus, to facilitate conserving (e.g., optimizing) storage capacity ofthe electronic device 10, as in the depicted example, the opticalcross-talk compensation factor map 156A may explicitly identify a subsetof pixel positions 158 on the display panel 38. In other words, in suchembodiments, one or more pixel positions 158 and, thus, correspondingoptical cross-talk compensation factors may not be explicitly identifiedin the optical cross-talk compensation factor map 156A. In suchembodiments, when input image data associated a pixel position 158 thatis not explicitly identified in the optical cross-talk compensationfactor map 156A is received, the optical cross-talk compensation block154 may determine one or more optical cross-talk compensation factors tobe applied to the image data by interpolating factors associated withother pixel positions 158 explicitly identified in the opticalcross-talk compensation factor map 156, for example, using linearinterpolation, bi-linear interpolation, spline interpolation, and/or thelike. Merely as an illustrative example, the optical cross-talkcompensation block 154 may determine a red optical cross-talkcompensation factor by interpolating red optical cross-talk compensationfactors explicitly indicated in the optical cross-talk compensationfactor map 156, a red-to-green optical cross-talk compensation factor byinterpolating red-to-green optical cross-talk compensation factorsexplicitly indicated in the optical cross-talk compensation factor map156, and so on.

In other words, returning to the image processing circuitry 27 of FIG.24 , the optical cross-talk compensation block 154 may be a panel domainblock 160 that operates using a panel (e.g., native) domain of thedisplay panel 38. That is, a panel domain block 160 in the imageprocessing circuitry 27 may process image data using the pixelresolution of the display panel 38. As in the depicted example, thepanel domain blocks 160 may additionally include a dither block 162, forexample, which is implemented and/or operated to process image data tointroduce structured noise in corresponding image content.

However, to facilitate improving processing efficiency, in someembodiments, the image processing circuitry 27 may additionally processimage data at least in part in a foveated (e.g., grouped or compressed)domain, for example, used by the source image data 142. In other words,as in the depicted example, the image processing circuitry 27 mayinclude one or more foveated domain blocks 164 that operate using thefoveated domain. For example, the foveated domain blocks 164 may includea white point compensation (WPC) block 166 and/or a chromatic aberrationcompensation (CAC) block 168 that processes image data using a pixelresolution lower than the (e.g., full) pixel resolution of the displaypanel 38, which, at least in some instances, may facilitate reducing theamount of image data processed by the foveated domain blocks 164 and,thus, improving processing efficiency of the image processing circuitry27.

To facilitate interoperation between the foveated domain blocks 164 andthe panel domain blocks 160, as in the depicted example, the imageprocessing circuitry 27 may include a domain conversion block (e.g.,circuitry group) 170 coupled therebetween. In particular, the domainconversion block 170 may be implemented and/or operated to convertbetween the foveated (e.g., grouped and/or compressed) domain and thepanel (e.g., native) domain of the display panel 38. In other words, thedomain conversion block 170 may convert image data between a pixelresolution used in a corresponding foveation region and the (e.g., full)pixel resolution of the display panel 38. For example, when the pixelresolution used in a central foveation region 150 matches the pixelresolution of the display panel 38, image data (e.g., image pixels)corresponding with the central foveation region 150 may pass through thedomain conversion block 170 unchanged.

On the other hand, when the pixel resolution of an outer foveationregion 152 is lower than the pixel resolution of the display panel 38,the domain conversion block 170 may convert image data (e.g., imagepixels) corresponding with the outer foveation region 152 from the lowerpixel resolution to the pixel resolution of the display panel 38 atleast in part by outputting multiple instances of the image data. Forexample, the domain conversion block 170 may convert image datacorresponding with a first set of outer foveation regions 152, whichutilize a pixel resolution that is half the pixel resolution of thedisplay panel 38, to the panel domain by outputting two instances of theimage data such that a first instance is associated with a first displaypixel 56 and a second instance is associated with a second display pixel56. Additionally, the domain conversion block 170 may convert image datacorresponding with a second set of outer foveation regions 152, whichutilize a pixel resolution that is a quarter of the pixel resolution ofthe display panel 38, to the panel domain by outputting four instancesof the image data.

Furthermore, the domain conversion block 170 may convert image datacorresponding with a third set of outer foveation regions 152, whichutilize a pixel resolution that is an eighth of the pixel resolution ofthe display panel 38, to the panel domain by outputting eight instancesof the image data. Moreover, the domain conversion block 170 may convertimage data corresponding with a fourth set of outer foveation regions152, which utilize a pixel resolution that is a sixteenth of the pixelresolution of the display panel 38, to the panel domain by outputtingsixteen instances of the image data. Since the source image data 142 maybe received in the foveated domain, as in the depicted example, thefoveated domain blocks 164 may be implemented upstream relative to thedomain conversion block 170 and the domain conversion block 170 may beimplemented upstream relative to the panel domain blocks 160.

To help further illustrate, an example of a process 172 for implementing(e.g., manufacturing) image processing circuitry 27, which may bedeployed in an electronic device 10, is described in FIG. 27 .Generally, the process 172 includes implementing foveated domain imageprocessing circuitry (process block 174) and implementing domainconversion circuitry downstream relative to the foveation domain imageprocessing circuitry (process block 176). Additionally, the process 172includes implementing panel domain image processing circuitry downstreamrelative to the domain conversion circuitry (process block 178).

Although described in a particular order, which represents a particularembodiment, it should be noted that the manufacturing process 172 may beperformed in any suitable order. Additionally, embodiments of themanufacturing process 172 may omit process blocks and/or includeadditional process blocks. Moreover, in some embodiments, themanufacturing process 172 may be performed at least in part by amanufacturing system (e.g., one or more devices).

As described above, image processing circuitry 27 implemented in anelectronic device 10 may include one or more foveated domain blocks(e.g., circuitry groups) 164, which each operate using a pixelresolution of a foveated domain that is less than the pixel resolutionof a display panel 38 used by the electronic device 10. Thus, in someembodiments, implementing foveated domain image processing circuitry mayinclude implementing one or more foveated domain blocks 164 in the imageprocessing circuitry 27 (process block 174). For example, implementingthe foveation domain image processing circuitry may include implementinga white point compensation (WPC) block 166 and/or a chromatic aberrationcompensation (CAC) block 168 in the image processing circuitry 27.

Additionally, as described above, image processing circuitry 27implemented in an electronic device 10 may include one or more paneldomain blocks (e.g., circuitry groups) 160, which each operate using apixel resolution that matches the pixel resolution of a display panel 38used by the electronic device 10. Thus, in some embodiments,implementing panel domain image processing circuitry may includeimplementing one or more panel domain blocks 160 in the image processingcircuitry 27 (process block 178). For example, implementing the paneldomain image processing circuitry may include implementing an opticalcross-talk compensation (OXTC) block 154 in the image process circuitry27 (process block 180).

As described above, an optical cross-talk compensation block 154 mayprocess image data using an optical cross-talk compensation (OXTC)factor map 156 to facilitate compensating for optical cross-talk betweenneighboring (e.g., differently colored) color component sub-pixels on adisplay panel 38 and, thus, resulting color shift. However, as describedabove, perceivability of color shift resulting from optical cross talkmay vary with viewing characteristics, such as viewing (e.g., pupil orgaze) angle and/or viewing location (e.g., pupil offset from centerand/or pupil relief). Accordingly, in some embodiments, implementing theoptical cross-talk compensation block 154 may include calibrating anoptical cross-talk compensation factor map 156 to be used by the opticalcross-talk compensation block 154 (process block 182).

For example, in some embodiments, a single (e.g., static) opticalcross-talk compensation factor map 156 may be calibrated to a displaypanel 38 to account for multiple different sets of viewingcharacteristics. To facilitate improving efficacy of optical cross-talkcompensation, in other embodiments, the optical cross-talk compensationblock 154 may include and/or have access to multiple candidate opticalcross-talk compensation factor maps 156, which are each calibrated for adifferent set of viewing characteristics. In other words, in suchembodiments, the optical cross-talk compensation block 154 may select adifferent candidate optical cross-talk compensation factor maps as atarget candidate optical cross-talk compensation factor map underdifferent sets of viewing characteristics and, thus, adaptively adjustprocessing of input image data.

To help illustrate, an example of an optical cross-talk compensationblock 154A, which may be implemented (e.g., deployed) in imageprocessing circuitry 27 of an electronic device 10, is shown in FIG. 28. As depicted, the optical cross-talk compensation block 154A receivesinput image data 184. In some embodiments, the input image data 184 maybe source image data 142 output from an image source 132. In otherembodiments, upstream image processing circuitry may process the sourceimage data 142 and supply the input image data 184 to the opticalcross-talk compensation block 154.

Additionally, as in the depicted example, the optical cross-talkcompensation block 154A may process the input image data 184 todetermine (e.g., generate) output image data 186. In some embodiments,the output image data 186 may be display image data 147, which will besupplied to an electronic display 12 to enable the electronic display 12to display corresponding image content. In other embodiments, the outputimage data 186 may be supplied to downstream image processing circuitry27, such as a dither block 162, for further processing to determine thedisplay image data 147.

As described above, image data may include color component image dataindicative of target light emission magnitude of one or more specificcolor components. For example, the input image data 184 may include redcomponent input image data 184, blue component input image data 184,green component input image data 184, and/or white component input imagedata 184. Accordingly, the output image data 186 determined byprocessing the input image data 184 may include red component outputimage data 186, blue component output image data 186, green componentoutput image data 186, and/or white component output image data 186.

To determine the output image data 186, the optical cross-talkcompensation block 154A may apply one or more target optical cross-talkcompensation (OXTC) factors 188 to the input image data 184. Inparticular, as in the depicted example, the optical cross-talkcompensation block 154A may include factor application circuitry 190that receives the input image data 184 and applies the one or moretarget pixel uniformity compensation factors 188 to the input image data184 to determine the output image data 186. In some embodiments,different target pixel uniformity compensation factors 188 may beapplied to different color components in the input image data 184.

Merely as an illustrative example, the factor application circuitry 190may apply a target red optical cross-talk compensation factor 188, atarget green-to-red optical cross-talk compensation factor 188, andtarget blue-to-red optical cross-talk compensation factor 188 to redcomponent input image data 184. Additionally, the factor applicationcircuitry 190 may apply a target red-to-green optical cross-talkcompensation factor 188, a target green optical cross-talk compensationfactor 188, and a target blue-to-green optical cross-talk compensationfactor 188 to the green component input image data 184. Furthermore,factor application circuitry 190 may apply a target red-to-blue opticalcross-talk compensation factor 188, a target green-to-blue opticalcross-talk compensation factor 188, and a target blue optical cross-talkcompensation factor 188 to blue component input image data 184.

Moreover, merely as an illustrative example, the factor applicationcircuitry 190 may determine red component output image data 186 as a sumof a result of application of the target red optical cross-talkcompensation factor 188 to the red component input image data 184, aresult of application of the target red-to-green optical cross-talkcompensation factor 188 to the green component input image data 184, anda result of application of the target red-to-blue optical cross-talkcompensation factor 188 to blue component input image data 184.Additionally, the factor application circuitry 190 may determine greencomponent output image data 186 as a sum of a result of application ofthe target green-to-red optical cross-talk compensation factor 188 tothe red component input image data 184, a result of application of thetarget green optical cross-talk compensation factor 188 to the greencomponent input image data 184, and a result of application of thetarget green-to-blue optical cross-talk compensation factor 188 to bluecomponent input image data 184. Furthermore, the factor applicationcircuitry 190 may determine blue component output image data 186 as asum of a result of application of the target blue-to-red opticalcross-talk compensation factor 188 to the red component input image data184, a result of application of the target blue-to-green opticalcross-talk compensation factor 188 to the green component input imagedata 184, and a result of application of the target blue opticalcross-talk compensation factor 188 to blue component input image data184

As described above, optical cross-talk compensation factors to beapplied to image data may be indicated via an optical cross-talkcompensation factor map 156, which explicitly associates each of one ormore pixel positions on a display panel 38 to one or more opticalcross-talk compensation factors to be applied to image datacorresponding with a display pixel 56 at the pixel position.Additionally, as described above, perceivability of color shiftresulting from optical cross-talk may vary with viewing characteristicswith which the display panel 38 is viewed. To facilitate adaptivelyadjusting optical cross-talk compensation applied to input image data184, as in the depicted example, the optical cross-talk compensationblock 154A may include and/or have access to multiple candidate opticalcross-talk compensation (OXTC) factor maps 192 from which a targetoptical cross-talk compensation (OXTC) factor map 194 may be determined(e.g., selected and/or identified).

In some embodiments, each of the candidate optical cross-talkcompensation factor maps 192 may be associated with a different set ofviewing characteristics, which each include a viewing angle and/or aviewing location. For example, a first candidate optical cross-talkcompensation factor map 192A may be associated with a first set ofviewing characteristics, an Mth candidate optical cross-talkcompensation factor map 192M may be associated with an Mth set ofviewing characteristics, and so on. To facilitate selecting the targetoptical cross-talk compensation factor map 194 from the candidateoptical cross-talk compensation factor maps 192, as in the depictedexample, the optical cross-talk compensation block 154A may includeselection circuitry 196, which receives one or more viewingcharacteristic parameters indicative of viewing characteristics withwhich a display panel 38 is expected to be viewed, for example, from aneye tracking sensor 134. In this manner, the selection circuitry 196 mayidentify (e.g., select) a candidate optical cross-talk compensationfactor map 192 associated with a set of viewing characteristicsindicated by the viewing characteristic parameters 198 as the targetoptical cross-talk compensation factor map 194.

Additionally, in some embodiments, an optical cross-talk compensationfactor map 156, such as a candidate optical cross-talk compensationfactor map 192 and a target optical cross-talk compensation factor map194, used by the optical cross-talk compensation block 154A mayexplicitly associate each pixel position 158 on a display panel 38 withcorresponding candidate optical cross-talk compensation factor 202. Inother words, in such embodiments, the selection circuitry 196 may selecta candidate optical cross-talk compensation factor 202, which isexplicitly associated with a pixel position 158 corresponding to theinput image data 184 in the target optical cross-talk compensationfactor map 194, as a target optical cross-talk compensation factor 188to be applied to the input image data 184.

As such, to facilitate determining a target optical cross-talkcompensation factor 188 to be applied to the input image data 184, as inthe depicted example, the selection circuitry 196 may determine (e.g.,receive) a pixel position parameter 200 indicative of a pixel positionof a display pixel 56 corresponding with the input image data 184. Insome embodiments, a frame of image content may be written to displaypixels 56 and, thus, processed in raster order. Accordingly, in suchembodiments, image processing circuitry 27 (e.g., optical cross-talkcompensation block 154) may additionally or alternatively determine thepixel position corresponding with the input image data 184 based atleast in part on its processing order relative to other image data inthe same frame, for example, in view of pixel dimensions of the displaypanel 38 that will be used to display the image content.

However, as described above, in some embodiments, optical cross-talkcompensation factor maps 156 may be stored in the electronic device 10,for example, in main memory 20, a storage device 22, and/or internalmemory of the image processing circuitry 27. As such, to facilitateconserving (e.g., optimizing) storage capacity of the electronic device10, in some embodiments, the optical cross-talk compensation factor maps156 may each be implemented to explicitly associate a subset of pixelpositions 158 on a display panel 38 to corresponding optical cross-talkcompensation factors. In other words, in such embodiments, targetoptical cross-talk compensation factors 188 may not be explicitlydefined for one or more pixel positions 158 on the display panel 38.Thus, in such embodiments, when a pixel position 158 corresponding withthe input image data 184 is not explicitly identified in the targetoptical cross-talk compensation factor map 194, the selection circuitry196 may determine a target optical cross-talk compensation factor 188 tobe applied to the input image data 184 by interpolating candidateoptical cross-talk compensation factors 202 associated with pixelpositions 158 explicitly identified in the target optical cross-talkcompensation factor map 194, for example, using a linear interpolation,a bi-linear interpolation, a spline interpolation, and/or the like.

Merely as an illustrative example, the selection circuitry 196 maydetermine a target red optical cross-talk compensation factor 188 byinterpolating candidate red optical cross-talk compensation factors 202explicitly indicated in the target optical cross-talk compensationfactor map 194, a target red-to-blue cross-talk compensation factor 188by interpolating candidate red-to-blue optical cross-talk compensationfactors 202 explicitly indicated in the target optical cross-talkcompensation factor map 194, and/or a target red-to-green opticalcross-talk compensation factor 188 by interpolating candidatered-to-green optical cross-talk compensation factors 202 explicitlyindicated in the target optical cross-talk compensation factor map 194.Additionally, the selection circuitry 196 may determine a targetgreen-to-red optical cross-talk compensation factor 188 by interpolatingcandidate green-to-red optical cross-talk compensation factors 202explicitly indicated in the target optical cross-talk compensationfactor map 194, a target green optical cross-talk compensation factor188 by interpolating candidate green optical cross-talk compensationfactors 202 explicitly indicated in the target optical cross-talkcompensation factor map 194, and/or a target green-to-blue opticalcross-talk compensation factor 188 by interpolating candidategreen-to-blue optical cross-talk compensation factors 202 explicitlyindicated in the target optical cross-talk compensation factor map 194.Furthermore, the selection circuitry 196 may determine a targetblue-to-red optical cross-talk compensation factor 188 by interpolatingcandidate blue-to-red optical cross-talk compensation factors 202explicitly indicated in the target optical cross-talk compensationfactor map 194, a target blue-to-green optical cross-talk compensationfactor 188 by interpolating candidate blue-to-green optical cross-talkcompensation factors 202 explicitly indicated in the target opticalcross-talk compensation factor map 194, and/or a target blue opticalcross-talk compensation factor 188 by interpolating candidate blueoptical cross-talk compensation factors 202 explicitly indicated in thetarget optical cross-talk compensation factor map 194.

As described above, the factor application circuitry 190 may then applyone or more target optical cross-talk compensation factors 188 to theinput image data 184, thereby processing the input image data 184 todetermine (e.g., generate) output image data 186. Additionally, asdescribed above, processing the input image data 184 in this manner mayenable different optical cross-talk compensation factors to be appliedat different pixel positions 158 and/or to different color components,which, at least in some instances may facilitate compensating (e.g.,correcting and/or offsetting) for variations in perceivability of colorshift user different sets of viewing characteristics. In other words,implementing an optical cross-talk compensation block 154 in this mannermay enable the optical cross-talk compensation block 154 to adaptivelyadjust processing to account for different sets of viewingcharacteristics, which, at least in some instances, may facilitatereducing perceivability of color shift resulting from optical cross-talkbetween neighboring color component sub-pixels on a display panel 38and, thus, improving perceived image quality provided by the displaypanel 38.

To help further illustrate, an example of a process 204 for operating anoptical cross-talk compensation block (e.g., circuitry group) 154, whichmay be implemented in image processing circuitry 27 of an electronicdevice 10, is described in FIG. 29 . Generally, the process 204 includesdetermining input image data (process block 206), determining viewingcharacteristics with which a display panel is expected to be viewed(process block 208), and determining a target optical cross-talkcompensation factor map based on the expected viewing characteristics(process block 210). Additionally, the process 204 includes determininga pixel position associated with the input image data (process block212), determining a target optical cross-talk compensation factorcorresponding with the pixel position based on the target opticalcross-talk compensation factor map (process block 214), and determiningoutput image data by applying the target optical cross-talk compensationfactor to the input image data (process block 216).

Although described in a particular order, which represents a particularembodiment, it should be noted that the process 204 may be performed inany suitable order. Additionally, embodiments of the process 204 mayomit process blocks and/or include additional process blocks. Moreover,in some embodiments, the process 204 may be implemented at least in partby circuit connections formed (e.g., programmed) in image processingcircuitry 27. Additionally or alternatively, the process 204 may beimplemented at least in part by executing instructions stored in atangible, non-transitory, computer-readable medium, such as controllermemory 140, using processing circuitry, such as a controller processor138.

Accordingly, in some embodiments, a controller 136 may instruct imageprocessing circuitry 27 implemented in an electronic device 10 todetermine input image data 184, which is to be supplied to an opticalcross-talk compensation block 154 implemented therein (process block206). As described above, in some embodiments, the input image data 184may be source image data 142 and, thus, output and/or received from animage source 132. In other embodiments, upstream image processingcircuitry 27 may process the source image data 142 to determine theinput image data 184 supplied to the optical cross-talk compensationblock 154.

Additionally, the optical cross-talk compensation block 154 maydetermine a set of viewing characteristics with which a display panel 38used by the electronic device 10 is expected to be viewed (process block208). As described above, in some embodiments, a set of viewingcharacteristics may include a viewing (e.g., pupil or gaze) angle and/ora viewing location (e.g., pupil offset from center and/or pupil relief).Thus, in some embodiments, determining the set of viewingcharacteristics may include determining a viewing angle with which thedisplay panel 38 is expected to be viewed (process block 218).Additionally or alternatively, determining the set of viewingcharacteristics may include determining a viewing location with whichthe display panel 38 is expected to be viewed (process block 220).

As described above, in some embodiments, the optical cross-talkcompensation block 154 may receive one or more viewing characteristicparameters 198 indicative of a set of viewing characteristics with whichdisplay panel 38 is expected to be viewed, for example, from an eyetracking sensor 134. For example, the viewing characteristic parameters198 may indicate a horizontal (e.g., x-direction) offset of pupilposition from a default (e.g., forward facing) pupil position and avertical (e.g., y-direction) offset of pupil position from the defaultpupil position and, thus, may be indicative of expected viewing angle.Additionally or alternatively, the viewing characteristic parameters 198may include a pupil relief (e.g., distance from pupil to display panel)and, thus, may be indicative of expected viewing location.

Furthermore, in some embodiments, one or more viewing characteristicparameters 198 may be updated for each image frame 148. In other words,in such embodiments, the viewing characteristic parameters 198 may beindicative of a set of viewing characteristics with which image contentcorresponding with the input image data 184 is expected to be viewed. Inother embodiments, the viewing characteristic parameters 198 may beupdated at a rate slower than a refresh (e.g., frame) rate of thedisplay panel 38. For example, an eye tracking camera may determineviewing characteristic parameters 198 when a (e.g., virtual-realityand/or mixed-reality) headset 10E is initially put on by a user 34 andperiodically update the viewing characteristic parameters 198 every onehundred image frames 148. In other words, in such embodiments, theviewing characteristic parameters 198 may be indicative of a set ofviewing characteristics with which a pervious image frame 148 isexpected to be viewed.

Based on the set of expected viewing characteristics, the opticalcross-talk compensation block 154 may determine a target opticalcross-talk compensation factor map 194 (process block 210). As describedabove, in some embodiments, the optical cross-talk compensation block154 may include and/or have access to multiple candidate opticalcross-talk compensation factor maps 192, which are each calibrated for adifferent set of viewing characteristics. Thus, in such embodiments, theoptical cross-talk compensation block 154 may select (e.g., identify) acandidate optical cross-talk compensation factor map 192 associated withthe set of expected viewing characteristics as the target opticalcross-talk compensation factor map 194.

Additionally, the optical cross-talk compensation block 154 maydetermine (e.g., identify) a pixel position of a display pixel 56 on thedisplay panel 38 that will be used to display image contentcorresponding with the input image data 184 (process block 212). Asdescribed above, in some embodiments, a frame of image content may bewritten to display pixels 56 and, thus, processed in raster order.Accordingly, in some such embodiments, the optical cross-talkcompensation block 154 may determine the pixel position correspondingwith the input image data 184 based at least in part on its processingorder relative to other image data in the same frame, for example, inview of pixel dimensions of the display panel 38 that will be used todisplay the image content. Additionally or alternatively, as describedabove, the optical cross-talk compensation block 154 may receive a pixelposition parameter 200, which identifies a pixel position associatedwith the input image data 184.

Based at least in part on the pixel position 158 and the target opticalcross-talk compensation factor map 194, the optical cross-talkcompensation block 154 may determine one or more target opticalcross-talk compensation factors 188 to be applied to the input imagedata 184 (process block 214). As described above, in some embodiments,the target optical cross-talk compensation factors 188 correspondingwith a pixel position 158 may include a target red optical cross-talkcompensation factor 188, a target red-to-blue cross-talk compensationfactor 188, a target red-to-green optical cross-talk compensation factor188, a target green-to-red optical cross-talk compensation factor 188, atarget green optical cross-talk compensation factor 188 a targetgreen-to-blue optical cross-talk compensation factor 188, a targetblue-to-red optical cross-talk compensation factor 188, a targetblue-to-green optical cross-talk compensation factor 188, a target blueoptical cross-talk compensation factor 188, or any combination thereof.When the pixel position corresponding with the input image data 184 isincluded in the target optical cross-talk compensation factor map 194,the optical cross-talk compensation block 154 may identify eachcandidate optical cross-talk compensation factor 202 explicitlyassociated with the pixel position as a target optical cross-talkcompensation factor 188 (process block 222).

However, as described above, in some embodiments, an optical cross-talkcompensation factor map 156, such as the target optical cross-talkcompensation factor map 194, used by the optical cross-talk compensationblock 154A may explicitly associate a subset of pixel positions 158 onthe display panel 38 to corresponding optical cross-talk compensationfactors. In other words, in such embodiments, target optical cross-talkcompensation factors 188 may not be explicitly defined for one or morepixel position 158 on the display panel 38. Thus, in such embodiments,when the pixel position 158 corresponding with the input image data 184is not explicitly identified in the target optical cross-talkcompensation factor map 194, the optical cross-talk compensation factormay determine a target optical cross-talk compensation factor 188 to beapplied to the input image data 184 by interpolating candidate opticalcross-talk compensation factors 202 associated with other pixelpositions 158 explicitly identified in the target optical cross-talkcompensation factor map 194, for example, using linear interpolation,bi-linear interpolation, spline interpolation, and/or the like (processblock 224). For example, the optical cross-talk compensation block 154may determine a target red optical cross-talk compensation factor 188 byinterpolating candidate red optical cross-talk compensation factors 202explicitly indicated in the target optical cross-talk compensationfactor map 194, a target red-to-green optical cross-talk compensationfactor 188 by interpolating candidate red-to-green optical cross-talkcompensation factors 202 explicitly indicated in the target opticalcross-talk compensation factor map 194, and so on.

The optical cross-talk compensation block 154 may then apply one or moretarget optical cross-talk compensation factors 188 to the input imagedata 184 to determine output image data 186 (process block 216). Forexample, in some embodiments, the optical cross-talk compensation block154 may determine the output image data 186 by applying a three-by-threematrix of target optical cross-talk compensation factors 188 to athree-by-one matrix (e.g., vector) of red component input image data184, green component input image data 184, and blue component inputimage data 184. In other words, in such embodiments, the opticalcross-talk compensation block 154 may determine red component outputimage data 186 as a sum of a result of application of the target redoptical cross-talk compensation factor 188 to the red component inputimage data 184, a result of application of the target red-to-greenoptical cross-talk compensation factor 188 to the green component inputimage data 184, and a result of application of the target red-to-blueoptical cross-talk compensation factor 188 to blue component input imagedata 184. Additionally, the optical cross-talk compensation block 154may determine green component output image data 186 as a sum of a resultof application of the target green-to-red optical cross-talkcompensation factor 188 to the red component input image data 184, aresult of application of the target green optical cross-talkcompensation factor 188 to the green component input image data 184, anda result of application of the target green-to-blue optical cross-talkcompensation factor 188 to blue component input image data 184.Furthermore, the optical cross-talk compensation block 154 may determineblue component output image data 186 as a sum of a result of applicationof the target blue-to-red optical cross-talk compensation factor 188 tothe red component input image data 184, a result of application of thetarget blue-to-green optical cross-talk compensation factor 188 to thegreen component input image data 184, and a result of application of thetarget blue optical cross-talk compensation factor 188 to blue componentinput image data 184.

As described above, in some embodiments, the output image data 186 maybe display image data 147, which is supplied to an electronic display 12to enable the electronic display 12 to display corresponding imagecontent on its display panel 38. In other embodiments, the output imagedata 186 may be further processed by downstream image processingcircuitry 27 to determine the display image data 147, for example, by atleast in part by burn-in compensation (BIC) block and/or a dither block162. In this manner, the techniques described in the present disclosuremay enable an electronic device to adaptively adjust optical cross-talkcompensation applied to image data, which, at least in some instances,may facilitate reducing perceivability and/or likelihood of color shiftresulting from optical cross-talk occurring in display image contentand, thus, improving perceived image quality of the displayed imagecontent.

The specific embodiments described above have been shown by way ofexample, and it should be understood that these embodiments may besusceptible to various modifications and alternative forms. It should befurther understood that the claims are not intended to be limited to theparticular forms disclosed, but rather to cover all modifications,equivalents, and alternatives falling within the spirit and scope ofthis disclosure.

It is well understood that the use of personally identifiableinformation should follow privacy policies and practices that aregenerally recognized as meeting or exceeding industry or governmentalrequirements for maintaining the privacy of users. In particular,personally identifiable information data should be managed and handledso as to minimize risks of unintentional or unauthorized access or use,and the nature of authorized use should be clearly indicated to users.

What is claimed is:
 1. An electronic device comprising a display panel,wherein the display panel comprises: a first color component sub-pixel,wherein the first color component sub-pixel comprises a first organiclight-emitting diode in a light-emitting diode layer and a first colorfilter cell in a color filter layer that has a first size; and a secondcolor component sub-pixel, wherein the second color component sub-pixelcomprises a second organic light-emitting diode in the light-emittingdiode layer and a second color filter cell in the color filter layerthat has a second size different from the first size of the first colorfilter cell of the first color component sub-pixel, wherein the colorfilter layer overhangs the light-emitting diode layer and comprises thefirst color filter cell of the first color component sub-pixel that atleast partially overlaps the second organic light-emitting diode of thesecond color component sub-pixel that is a different color compared tothe first color component sub-pixel.
 2. The electronic device of claim1, comprising a lens implemented in front of the display panel.
 3. Theelectronic device of claim 1, wherein the first color componentsub-pixel and the second color component sub-pixel are a same color. 4.The electronic device of claim 1, wherein: the second color componentsub-pixel is located farther from a center of the display panel than thefirst color component sub-pixel; and the second size of the second colorfilter cell is greater than the first size of the first color filtercell.
 5. The electronic device of claim 1, wherein a first footprint ofthe first color filter cell is smaller than a second footprint of thesecond color filter cell.
 6. The electronic device of claim 1, wherein afirst thickness of the first color filter cell is less than a secondthickness of the second color filter cell.
 7. The electronic device ofclaim 1, wherein the display panel comprises a third color componentsub-pixel with a third color filter cell that has a third size differentfrom the first size of the first color filter cell and the second sizeof the second color filter cell.
 8. The electronic device of claim 7,wherein: the third color component sub-pixel is located between thefirst color component sub-pixel and the second color componentsub-pixel; and the third size of the third color filter cell is greaterthan the first size of the first color filter cell and less than thesecond size of the second color filter cell.
 9. The electronic device ofclaim 1, wherein the display panel comprises a third color componentsub-pixel with a third color filter cell that matches the first size ofthe first color filter cell.
 10. The electronic device of claim 1,wherein: a first footprint of the first color filter cell is centered ona first normal axis of the first organic light-emitting diode; and asecond footprint of the second color filter cell is off-centered from asecond normal axis of the second organic light-emitting diode.
 11. Amethod of implementing a display panel, comprising: determining, using adesign system, perceivability of color shift expected to result in imagecontent displayed on the display panel when implemented with baselinepanel implementation parameters, wherein the baseline panelimplementation parameters comprise a first size of a color filter layerin the display panel and a second size of an encapsulation layerimplemented between the color filter layer and a light emissive elementlayer of the display panel; determining, using the design system,whether implementing the display panel using the baseline panelimplementation parameters is expected to result in color shift greaterthan a color shift threshold; and in response to determining that thebaseline panel implementation parameters are expected to result in colorshift greater than the color shift threshold, determining, using thedesign system, adjusted panel implementation parameters to be used toimplement the display panel, wherein the adjusted panel implementationparameters comprise a first adjusted size of the color filter layer thatis thinner than the first size, a second adjusted size of theencapsulation layer that is thinner than the second size, or both. 12.The method of claim 11, wherein: the baseline panel implementationparameters comprise a baseline footprint of color filter cells in thecolor filter layer of the display panel; and the adjusted panelimplementation parameters comprise one or more adjusted footprints ofthe color filter cells in the color filter layer that differ from thebaseline footprint of the color filter cells.
 13. The method of claim12, wherein the adjusted panel implementation parameters comprise: afirst adjusted footprint of a first color filter cell that is increasedfrom the baseline footprint by a first amount; and a second adjustedfootprint of a second color filter cell that is increased from thebaseline footprint by a second amount different from the first amount.14. The method of claim 12, wherein a first adjusted footprint of afirst color filter cell in the color filter layer and a second adjustedfootprint of a second color filter cell in the color filter layer differfrom the baseline footprint by a same amount.
 15. The method of claim11, wherein: the first adjusted size of the color filter layer is halfthe first size; the second adjusted size of the encapsulation layer ishalf the second size; or both.
 16. The method of claim 11, wherein theadjusted panel implementation parameters comprise the first adjustedsize of the color filter layer and the second adjusted size of theencapsulation layer.
 17. The method of claim 11, comprising maintainingthe baseline panel implementation parameters in response to determiningthat the baseline panel implementation parameters are not expected toresult in color shift greater than the color shift threshold.
 18. Adisplay panel of an electronic device, comprising: an organiclight-emitting diode layer; an encapsulation layer disposed over theorganic light-emitting diode layer; and a color filter layer disposedover the encapsulation layer, wherein the color filter layer overhangsthe organic light-emitting diode layer and comprises a first colorfilter cell of a first color component sub-pixel that has a first sizeand at least partially overlaps an organic light-emitting diode of asecond color component sub-pixel that is a different color compared tothe first color component sub-pixel, and a second color filter cell ofthe second color component sub-pixel that has a second size differentfrom the first size of the first color filter cell of the first colorcomponent sub-pixel.
 19. The display panel of claim 18, wherein thecolor filter layer comprises a plurality of color filter cells eachhaving a same footprint.
 20. The display panel of claim 18, wherein thecolor filter layer comprises a second color filter cell of the secondcolor component sub-pixel that at least partially overlaps anotherorganic light-emitting diode of a third color component sub-pixel,wherein: the third color component sub-pixel is located farther from acenter of the display panel than the second color component sub-pixel;the second color component sub-pixel is located farther from the centerof the display panel than the first color component sub-pixel; and thesecond color filter cell of the second color component sub-pixeloverlaps with the other organic light-emitting diode of the third colorcomponent sub-pixel more than the first color filter cell of the firstcolor component sub-pixel overlaps with the organic light-emitting diodeof the second color component sub-pixel.